Smith Charities Phase 1 Restoration 11-24-2020
PROJECT MANUAL
Smith Charities
Phase 1 Restoration
Northampton, MA
November 2020
Architect:
Jones Whitsett Architects
Please direct all project correspondence to:
office@joneswhitsett.com
413-773-5551
Structures North Smith Charities Phase 1 Restoration
November 2020 Northampton, MA
TABLE OF CONTENTS
Specifications-
Section 00100 Invitation to Bid
Section 00150 Instructions to Bidders
Section 00230 Qualification Statement
Section 00400 Form for General Bid
Section 01010 Summary of Work
Section 01351 Historic Treatment Procedures
Section 02050 Structural Dismantling
Section 02051 Historic Removal and Dismantling
Section 02210 Temporary Shoring and Bracing
Section 04100 Masonry Restoration
Section 04720 Unit Cast Stone
Section 04730 Unit Brownstone
Section 06050 Rough Carpentry and Timber
Section 06160 Sheathing
Section 07315 Slate Shingles
Section 07620 Sheet Metal Flashing and Trim
Section 07920 Joint Sealants
TABLE OF CONTENTS TOC - 1 of 1
Structures North
November 2020
Smith Charities Phase 1 Restoration
Northampton, MA
INVITATION TO BID 00100 - 1
SECTION 00100
INVITATION TO BID
Smith Charities, 51 Main Street, Northampton, MA 01060, requests bids for masonry repair of
their 1866 building which is listed in the State Register of Historic Places.
The project is being partially funded with a grant from the Massachusetts Preservation Projects
Fund through the Massachusetts Historical Commission. All work must be performed in accord-
ance with the documents prepared by Structures North Consulting Engineers Inc., 60 Washington
Street, Salem, MA 01970 and Jones Whitsett Architects, 308 Main Street, Suite 300, Greenfield
MA 01301, which meet the Secretary of Interior’s Standards for the Treatment of Historic Proper-
ties. State law prohibits discrimination. Awarding of this contract is subject to Affirmative Action
and Equal Opportunity guidelines.
Bid forms and Contract Documents are available at
https://www.biddocsonline.com/projects.php?list=recent.
A pre-bid meeting will be held at the SMITH CHARITIES, 51 Main Street, Northampton at
10:00 AM, December 8, 2020. Questions will be accepted until 12pm, December 21st and should
be directed to office@joneswhitsett.com.
Bids shall be evaluated on the basis of price, previous experience with similar types of construc -
tion projects, ability to perform the work in a timely manner, and references.
All bids must be delivered to SMITH CHARITIES, 51 Main Street, Northampton prior to 4
pm on December 29th, 2020 to be eligible for consideration.
All of the grant-funded work must be completed by June 30, 2021.
All bids shall be accompanied by a reference list of similar projects.
BID PROPOSALS MUST BE:
• Submitted on the form furnished herein, FORM FOR GENERAL BID, Section 00400
• Clearly labeled "Bid Proposal for Smith Charities - Phase 1 Restoration",
• Endorsed with the name and address of the bidder
• Addressed to SMITH CHARITIES, 51 Main Street, Northampton prior to 4 pm on De-
cember 29th, 2020
• emailed bids will be accepted if submitted to office@joneswhitsett.com as scanned
pdfs of the FORM FOR GENERAL BID, Section 00400, together with the accompany-
ing construction schedule and qualification statement noted below.
BID PROPOSALS shall be accompanied by:
(1) A fully executed FORM FOR GENERAL BID, Section 00400
(2) A proposed construction schedule indicating project staging, completion of work of the
Base Bid and any accepted Alternates; demobilization; and site cleanup.
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Smith Charities Phase 1 Restoration
Northampton, MA
INVITATION TO BID 00100 - 2
(4) Qualifications and References as requested in Qualification Statement, Section 00230.
EVALUATION OF BID PROPOSALS
Smith Charities reserves the right to waive any informalities in or to reject any or all proposals if
it be in the Owner's interest to do so.
In inviting bid proposals, Smith Charities shall reserve the right to reject any proposal, if it de -
termines that such bid does not represent the proposal of a person or entity competent to perform
the work as specified; or that fewer than three such proposals were received and the proposals
are not reasonable for acceptance without further competition.
WORK UNDER SEPARATE CONTRACTS AND BY OWNER: The Owner may do other work
during construction with his own forces, or by separate contract.
END OF INVITATION TO BID
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November 2020
Smith Charities Phase 1 Restoration
Northampton, MA
SECTION 150
Based on award of a contract to the selected bidder, the intent is completion of Phase 1
Restoration, by June 30, 2021.
INSTRUCTIONS TO BIDDERS
ADDENDA AND INTERPRETATIONS
Interpretation of all questions raised which, in the Engineer's or Architect's opinion, require inter -
pretation, will be sent as addenda in writing to all RFP document holders. Oral interpretations
given to prospective bidders will have no standing.
It shall be the sole responsibility of the bidders to ascertain the existence of any and all addenda
issues, whether or not the addenda is presented or mailed to or received by the bidder.
BID PRICE WORDS AND NUMERALS
In the event of a discrepancy between the numerals and the written words of a bid price, if the
intent of the bidder is not clear as determined by the Owner's Agent, the written word shall prevail.
EXAMINATION OF SITE AND DOCUMENTS
Before submitting bids, each bidder shall visit the site and shall examine all contract documents,
inspect and be familiar with them and the conditions under which work will be carried out. Neither
the Owner nor the Owner's Agent will be responsible for errors, omissions and / or changes for
extra work arising from the Contractor's failure to familiarize himself with contract documents or
existing site conditions.
By submitting a bid, the Contractor agrees and warrants that he has examined the site and the
contract documents, that he is familiar with the conditions and requirements of both and where
they require, in any part of the work, a given result to be produced, that the contract documents
are adequate and that he will produce the desired result.
COMMENCEMENT OF CONTRACT
The contract time commences immediately from the date that the executed copy of the Contract
is mailed to the Contractor, or within such other period as the Owner's Agent may authorize in
writing.
COMPLETION TIME
E N D O F S E C T I O N 0 0 1 5 0
INSTRUCTIONS TO BIDDERS 00150 - 1
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November 2020
Smith Charities Phase 1 Restoration
Northampton, MA
QUALIFICATION STATEMENT 00230 - 1
SECTION 00230
QUALIFICATION STATEMENT
In order to be eligible and responsible to bid on this project, General Bidders shall have a
minimum of five years of experience in the restoration of historic buildings, including masonry
repairs of the scope described herein, to buildings of a similar age, size and scale as the Smith
Charities Phase 1 Restoration; and shall have completed at least three similar projects in the
past five years, including at least three buildings on the State Register of Historic Places.
All bids shall be accompanied by a reference list of similar projects.
All masonry repairs performed as work of this Contract shall be directed by at least one person
who
• understands the specified requirements and the materials and methods needed for their
correct execution;
• shall be present at all times during performance of the work of these Sections;
Submitted to: the Trustees of the Smith Charities, Northampton, MA.
By (print name clearly):
Signature:
Principal Office:
Street City State Zip
The signer of this Qualification Statement guarantees the truth and accuracy of all statements and
of all answers to questions hereinafter made.
1. How many years has your organization been in business as a contractor under your present
business name?
2. How many years of experience in construction work has your organization had
(a) as a Prime Contractor? (b) as a Sub-Contractor?
3. Have you ever failed to complete any work awarded to you?
If so, name the project and location, and state the reason for failure to complete:
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QUALIFICATION STATEMENT 00230 - 2
4. List your references:
12. What projects has your organization completed? Be specific.
Identify which projects are listed in the State Register of Historic Places.
Project Contract Class of Date Owner's Name Phone
Name Amount Work Completed and Address Number
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Smith Charities Phase 1 Restoration
Northampton, MA
QUALIFICATION STATEMENT 00230 - 3
13. What is the construction experience of the principal individuals of your organization?
Identify which individuals have worked on projects listed in the State Register of Historic
Places.
Individual's Present Position Years of Type of Work In What
Name in Company Construction Capacity
Experience
END OF QUALIFICATION STATEMENT
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Smith Charities Phase 1 Restoration
Northampton, MA
FORM FOR GENERAL BID 00400 - 1
SECTION 00400
FORM FOR GENERAL BID
By submitting this bid the undersigned represents to the Owner:
• that they have examined and understands the Advertisement for Bids, Instructions to Bid -
ders, contract forms, General Conditions of the Contract, Drawings, Specifications and all other
Contract Documents, and has examined the site, as defined therein;
• that this bid is made with distinct reference and relation to all said Contract Documents;
• that in regard to the conditions affecting the work to be done and the labor and materials
needed, this bid is based upon his own investigation and research i n addition to any drawings,
surveys, measurements, dimensions, calculations, estimates, or other tests or representations of
any employee, officer, agent or consultant of the Owner.
A bidder wishing to amend this bid after transmittal to the Owner may do so only by withdrawing
this bid and resubmitting another bid prior to the time for opening bids.
Submitted to:
Smith Charities, 51 Main Street, Northampton, MA
Contact: Dorrie Brooks
Jones Whitsett Architects
office@joneswhitsett.com
A. The Undersigned proposes to furnish all labor and materials required to complete all of the
work for Smith Charities Phase 1 Restoration, in accordance with the accompanying
Drawings, Specifications and Addenda, prepared by Structures North Consulting Engineers
Inc., 60 Washington Street, Salem, MA 01970, for the Contract Price specified below, sub -
ject to additions or deductions according to the terms of the Specifications.
B. THIS BID INCLUDES ADDENDA NUMBERED:
C. PROPOSED CONTRACT PRICING if funds are not sufficient for the full scope of all four
elevations, or if Base Bid is awarded and additional funding becomes available as Base Bid
work progresses:
1. BASE BID:
Item #U2: sf @ =
(Resetting Interior Brickwork)
Item #U3: lf @ =
(Repair Exterior Masonry Wall Crack)
Item #U7: unit @ =
(Replacement of Broken Shingles)
Remainder of work by the Lump Sum =
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Smith Charities Phase 1 Restoration
Northampton, MA
FORM FOR GENERAL BID 00400 - 2
TOTAL BASE BID= $
2. ALTERNATE #A1:
Item #U3: lf @ =
(Repair of Exterior Masonry Wall Cracks)
Item #U4: cf @ =
(Installation of Stone Dutchmen above Keystones)
Item #U5: lf @ =
(Replacement of Failed Keystones)
Remainder of work by the Lump Sum=
TOTAL ALTERNATE #A1= $
3. ALTERNATE #A2:
Item #U3: lf @ =
(Repair of Exterior Masonry Wall Cracks)
Item #U4: cf @ =
(Installation of Stone Dutchmen above Keystones)
Item #U5: cf @ =
(Replacement of Failed Keystones)
Remainder of work by the Lump Sum=
TOTAL ALTERNATE #A2= $
4. ALTERNATE #A3:
Item #U6: lf @ =
(U6- Replacement of Failed Windowsills)
Remainder of work by the Lump Sum=
TOTAL ALTERNATE #A3= $
5. ALTERNATE #A4 (carpentry):
TOTAL ALTERNATE #A4= $
6. ALTERNATE #A5:
Item #U1: lf @ =
(Pinning and Grouting of Interior Brick Back-up Masonry)
Remainder of work by the Lump Sum=
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Smith Charities Phase 1 Restoration
Northampton, MA
FORM FOR GENERAL BID 00400 - 3
TOTAL ALTERNATE #A5= $
D. PERFORMANCE GUARANTEE: The undersigned agrees that, if he is selected as General
Contractor, he will within ten days, Saturdays, Sundays and legal holidays excluded, after
presentation thereof by the Awarding Authority, execute a contract in accordance with the
terms of this bid.
E. The undersigned further certifies under penalties of perjury that this bid is in all respects bo -
na fide, fair and made without collusion or fraud with any other person. As used herein the
word "person" shall mean any natural person, joint venture, partnership, corporation or other
business or legal entity.
Date
(Print Name of Bidder)
Social Security Number or
Federal Identification
Number:
By:
(Name and Title of Person Signing Bid)
Telephone: ( )
(Business Street Address)
(City, State and Zip Code)
END OF SECTION 00400 - FORM FOR GENERAL BID
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Smith Charities Phase 1 Restoration
Northampton, MA
SUMMARY OF WORK 01010-1
SECTION 01010
SUMMARY OF WORK
PART 1- GENERAL
1.1 GENERAL REQUIREMENTS
A. All work shall comply with the Massachusetts State Building Code and referenced
standards.
B. All work shall be coordinated between related trades.
C. Contractor shall field verify all existing conditions and dimensions and shall be
responsible for dimensional coordination. Notify the Engineer of any and all
discrepancies.
D. The contractor shall be responsible for all temporary shoring and guying of the existing
and new structure during the work, and for temporary protection of the surrounding
environs.
E. The Contractor shall be solely responsible for all means and methods of construction
employed on this project, and for all temporary bracing, support, and protection of the
existing structure. Any sequences of work or methods indicated or implied in the contract
documents are present only as assumptions on which the design of the permanent
installations were based and are to be considered as suggested options for review by the
contractor. Following review of existing conditions and the scope of work, the contracto r
shall submit his own statement of means and methods as well as schedule to the
Engineer and shall keep the Engineer abreast of all progress and the beginning and
completion of each phase or item of work.
F. The Contractor shall be solely responsible for maintaining the safety and stability of the
structure and all adjacent structures during all phases of the work, and shall correct any
defects or damage which results from his actions.
G. The Contractor shall clean-up the property at the end of each day. Maintain site in a
clean, unencumbered fashion from the end of work on Friday to the start of work on
Monday.
H. The Contractor shall protect the property, the street, sidewalk and abutters’ properties
from any water spray, spatter or windblown soil or mortar materials.
I. The Contractor shall submit a weekly schedule to the Owner for their use, along with an
overall project schedule updated on a monthly basis.
J. All work shall meet applicable requirements of the Secretary of the Interior’s Standards
for Historic Preservation. The contractor shall be responsible for treatment, protection
and restoration of all historic finishes affected by the structural work.
1.2 TECHNICAL SPECIFICATION SECTIONS
Section 00100 Invitation to Bid
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Smith Charities Phase 1 Restoration
Northampton, MA
SUMMARY OF WORK 01010-2
Section 00150 Instructions to Bidders
Section 00230 Qualification Statement
Section 00400 Form for General Bid
Section 01010 Summary of Work
Section 01351 Historic Treatment Procedures
Section 02050 Structural Dismantling
Section 02051 Historic Removal and Dismantling
Section 02210 Temporary Shoring and Bracing
Section 04100 Masonry Restoration
Section 04720 Unit Cast Stone
Section 04730 Unit Brownstone
Section 06050 Rough Carpentry and Timber
Section 06160 Sheathing
Section 07315 Slate Shingles
Section 07620 Sheet Metal Flashing and Trim
Section 07920 Joint Sealants
1.3 CONTRACT DRAWINGS
S1.1 Elevations
S2.1 Sections and Details
S2.2 Sections and Details
S3.1 Roof Framing Plan and Details
PART 2- PRODUCTS
2.1 PROVIDE: Products as indicated in the respective specification sections that are referenced in
the description of work.
PART 3- EXECUTION
3.1 DESCRIPTION OF WORK, MEASUREMENT AND PAYMENT:
A. General- Perform all work in accordance with the drawings and specifications under the
respective Base Bid or Alternate for this contract, which will include at least the following
items of work along with all incidental work required for the completion of these items in
conformance with this Specification and all referenced documents and drawings:
1. Protection of all structural, architectural, window, door and roofing elements and
adjacent structures to remain, as well as erection of a protection system for
passersby and to allow for safe access and egress into and out of the building at
all times.
2. All specified masonry, flashing and sealant work.
3. All necessary staging, protection and site storage.
4. Return of the premises to a clean, orderly and attractive condition following
completion of the work.
5. The following items of work shall be under the respective Base Bide or Alternate
Items on a unit cost basis, measured and paid as follows:
U1- Pinning and Grouting of Interior Brick Back-up Masonry, including inspection,
drilling and installation of helical ties, pre-wetting and gravity feeding of
restoration grout from above, measured by the square foot of interior wall
face.
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Smith Charities Phase 1 Restoration
Northampton, MA
SUMMARY OF WORK 01010-3
U2- Re-Setting of Interior Brickwork, including removal of loose, detached
brickwork and setting and bonding back into place with perpendicular
headers of stainless steel ties, measured by the square foot of each re-set
wythe.
U3- Repair of Exterior Masonry Wall Cracks, including cutting, jet-cleaning,
pointing and injection with restoration grout, measured by the lineal foot.
U4- Installation of Stone Dutchmen above Keystones over window arches,
including replication with salvaged stone, re-setting and pointing.
U5- Replacement of Failed Keystones in window arches, including shoring,
removal, cleaning, replication with salvaged stone, re-setting and pointing.
U6- Replacement of Failed Windowsills, including removal, cleaning, replication
with salvaged stone, re-setting and pointing.
U7- Replacement of Broken Slate Shingles, including removal, replacement, and
refastening using slate comparable in strength and color.
Unit Prices under Items U1 through U7 shall include the respective shares of
Division 1 costs. No separate increase or decrease in Division 1 costs shall be
made for changes in unit quantities, rather, they shall be included in the unit
prices themselves.
B. Base Bid- Perform the following work under the Base Bid, including all incidentals and all
general requirements of work:
1. Cutting back of brown stand stone cornice units and replacing with new bonded
cast stone dutchmen blind-pinned to the remaining stone and back-up
construction with double-tailed sock anchors and bonded with restoration grout
by the lump sum.
2. Cutting back of brown stand stone pediment units and replacing with new bonded
cast stone dutchmen blind-pinned to the remaining stone and back-up
construction with double-tailed sock anchors and bonded with restoration grout
by the lump sum.
3. Re-setting of interior brickwork within attic under item #U2.
4. Repair of cracks in exterior stonework under item #U3.
5. All incidental items and work that is associated with and required for the proper
completion of the above.
C. Alternate #A1- Perform the following work under the Alternate #A1, including all
incidentals and all general requirements of work:
1. Repair of cracks in exterior stonework under item #U3.
2. Filling gaps over window arches under item #U4.
3. Replacement of window arch keystones under item #U5.
4. All incidental items and work that is associated with and required for the proper
completion of the above.
D. Alternate #A2- Perform the following work under the Alternate #A2, including all
incidentals and all general requirements of work:
1. Repair of cracks in exterior stonework under item #U3.
2. Filling gaps over window arches under item #U4.
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Northampton, MA
SUMMARY OF WORK 01010-4
3. Replacement of window arch keystones under item #U5.
4. All incidental items and work that is associated with and required for the proper
completion of the above.
E. Alternate #A3- Perform the following work under the Alternate #A3, including all
incidentals and all general requirements of work:
1. Replacement of windowsills under item #U6.
2. All incidental items and work that is associated with and required for the proper
completion of the above.
F. Alternate #A4- Perform the following work under the Alternate #A4, including all
incidentals and all general requirements of work:
1. Roof framing carpentry repairs within the Attic by the Lump Sum.
G. Alternate #A5- Perform the following work under the Alternate #A5, including all
incidentals and all general requirements of work:
1. Pinning and grouting between wythes of brick back-up construction in the attic
under item #U1.
END OF SECTION
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Smith Charities Phase 1 Restoration
Northampton, MA
HISTORIC TREATMENT PROCEDURES 01351 - 1 of 9
SECTION 01351
HISTORIC TREATMENT PROCEDURES
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 1 Specification Sections, apply to this Section.
1.2 SUMMARY
A. This Section includes special procedures for historic treatment on Project including, b ut not
limited to, the following:
1. Storage and protection of existing historic materials.
2. Temporary protection of historic materials during construction.
3. Protection during application of chemicals.
4. Protection during use of heat-generating equipment.
5. Historic treatment procedures.
1.3 REFERENCES
A. Historic Quality Standard: Comply with National Park Service, U.S. Department of the Interior;
The Secretary of the Interior’s Standards for the Treatment of Historic Properties, with
Guidelines for Preserving, Rehabilitating, Restoring & Reconstructing Historic Buildings, and the
Preservation Briefs for each type of restoration and repair required for this Project.
1.4 DEFINITIONS
A. Consolidate: To strengthen loose or deteriorated materials in place.
B. Design Reference Sample: A sample that represents the Architect's prebid selection of work to
be matched; it may be existing work or work specially produced for the Project.
C. Dismantle: To disassemble or detach a historic item from a surface, or a nonhisto ric item from a
historic surface, using gentle methods and equipment to prevent damage to historic items and
surfaces; disposing of items unless indicated to be salvaged or reinstalled.
D. Historic: Spaces, areas, rooms, surfaces, materials, finishes, and overall appearance that are
important to the successful restoration and reconstruction as determined by Architect.
Designated historic surfaces are indicated on Drawings.
E. Match: To blend with adjacent construction and manifest no apparent difference in mate rial
type, species, cut, form, detail, color, grain, texture, or finish; as approved by Architect.
F. Refinish: To remove existing finishes to base material and apply new finish to match original, or
as otherwise indicated.
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G. Reinstall: To protect removed or dismantled item, repair and clean it as indicated for reuse, and
reinstall it in original position, or where indicated.
H. Remove: To take down or detach a nonhistoric item located within a historic space, area, or
room, using methods and equipment to prevent damage to historic items and surfaces;
disposing of items unless indicated to be salvaged or reinstalled.
I. Repair: To correct damage and defects, retaining existing materials, features, and finishes while
employing as little new material as possible. This includes patching, piecing-in, splicing,
consolidating, or otherwise reinforcing or upgrading materials.
J. Replace: To remove, duplicate, and reinstall entire item with new material. The original item is
the pattern for creating duplicates unless otherwise indicated.
K. Replicate: To reproduce in exact detail, materials, and finish unless otherwise indicated.
L. Reproduce: To fabricate a new item, accurate in detail to the original, and from either the same
or a similar material as the original, unless otherwise indicated.
M. Restore: To consolidate, replicate, reproduce, repair, and refinish as required to achieve the
indicated results.
N. Retain: To keep existing items that are not to be removed or dismantled.
O. Reversible: New construction work, treatments, or processes that c an be removed or undone in
the future without damaging historic materials unless otherwise indicated.
P. Salvage: To protect removed or dismantled items and deliver them to Owner.
Q. Stabilize: To provide structural reinforcement of unsafe or deteriorated items while maintaining
the essential form as it exists at present; also, to reestablish a weather-resistant enclosure.
R. Strip: To remove existing finish down to base material unless otherwise indicated.
1.5 COORDINATION
A. Historic Treatment Subschedule: General Contractor to provide construction schedule
coordinating the sequencing and scheduling of historic treatment work for entire Project,
including each activity to be performed in historic spaces, areas, and rooms, and on historic
surfaces; and based on Contractor's Construction Schedule. Secure time commitments for
performing critical construction activities from separate entities responsible for historic treatment
work.
1. Schedule construction operations in sequence required to obtain best historic treatment
results.
2. Coordinate sequence of historic treatment work activities to accommodate the following:
a. Owner's continuing occupancy of portions of existing building.
b. Owner's partial occupancy of completed Work.
c. Other known work in progress.
d. Tests and inspections.
3. Detail sequence of historic treatment work, with start and end dates.
4. Utility Services: Indicate how long utility services will be interrupted. Coordinate shutoff,
capping, and continuation of utility services.
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5. Equipment Data: List gross loaded weight, axle-load distribution, and wheel-base
dimension data for mobile and heavy equipment proposed for use. Do not use such
equipment without certification from Contractor's professional engineer that the structure
can support the imposed loadings without damage.
B. Public Circulation: Coordinate historic treatment work with public circulation patterns at Project
site. Some work is near public circulation patterns. Public circulation patterns cannot be closed
off entirely, and in places can be only temporarily redirected around small areas of work. Plan
and execute the Work accordingly.
1.6 PROJECT MEETINGS FOR HISTORIC TREATMENT
A. Preliminary Historic Treatment Conference: Before starting historic treatment work, Architect will
conduct conference at Project site.
1. Attendees: In addition to representatives of Owner, Architect, and Contractor, testing
service representative, historic treatment specialists, chemical-cleaner manufacturer, and
installers whose work interfaces with or affects historic treatment shall be represented at
the meeting.
2. Agenda: Discuss items of significance that could affect progress of historic treatment
work, including review of the following:
a. Historic Treatment Subschedule: Discuss and finalize; verify availability of
materials, historic treatment specialists' personnel, equipment, and facilities
needed to make progress and avoid delays.
b. Fire-prevention plan.
c. Governing regulations.
d. Areas where existing construction is to remain and the required protection.
e. Hauling routes.
f. Sequence of historic treatment work operations.
g. Storage, protection, and accounting for salvaged and specially fabricated items.
h. Existing conditions, staging, and structural loading limitations of areas where
materials are stored.
i. Qualifications of personnel assigned to historic treatment work and assigned
duties.
j. Requirements for extent and quality of work, tolerances, and required clearances.
k. Methods and procedures related to historic treatments, including product
manufacturers' written instructions and precautions regarding historic treatment
procedures and their effects on materials, components, and vegetation.
l. Embedded work such as flashings and lintels, special details, collection of wastes,
protection of occupants and the public, and condition of other construction that
affect the Work or will affect the work.
3. Reporting: Architect will record conference results and distribute copies to everyone in
attendance and to others affected by decisions or actions resulting from conference.
B. Coordination Meetings: Conduct coordination meetings specifically for historic tr eatment work at
weekly intervals. Coordination meetings are in addition to specific meetings held for other
purposes, such as progress meetings and preinstallation conferences.
1. Attendees: In addition to representatives of Owner, Architect, and Contractor, each
historic treatment specialist, supplier, installer, and other entity concerned with progress
or involved in planning, coordination, or performance of historic treatment work activities
shall be represented at these meetings. All participants at conference shall be familiar
with Project and authorized to conclude matters relating to historic treatment work.
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2. Agenda: Review and correct or approve minutes of previous coordination meeting.
Review other items of significance that could affect progress of historic treatment work.
Include topics for discussion as appropriate to status of Project.
a. Historic Treatment Subschedule: Review progress since last coordination meeting.
Determine whether each schedule item is on time, ahead of schedule, or behind
schedule. Determine how construction behind schedule will be expedited with
retention of quality; secure commitments from parties involved to do so. Discuss
whether schedule revisions are required to ensure that current and subsequent
activities are completed within the Contract Time.
b. Schedule Updating: Revise Contractor's Historic Treatment Subschedule after
each coordination meeting where revisions to schedule have been made or
recognized. Issue revised schedule concurrently with report of each meeting.
c. Review present and future needs of each entity present, including review items
listed in the "Preliminary Historic Treatment Conference" Paragraph above and the
following:
1) Interface requirements of historic treatment work with other Project Work.
2) Status of submittals for historic treatment work.
3) Access to historic treatment work.
4) Effectiveness of fire-prevention plan.
5) Quality and work standards of historic treatment work.
6) Change Orders for historic treatment work.
3. Reporting: Record meeting results and distribute copies to everyone in attendance and to
others affected by decisions or actions resulting from each meeting.
1.7 MATERIALS OWNERSHIP
A. Historic items, relics, and similar objects including, but not limited to, cornerstones and their
contents, commemorative plaques and tablets, antiques, and other items of interest or value to
Owner that may be encountered or uncovered during the Work, regardless of whether they
were previously documented, remain Owner's property.
1. Carefully dismantle and salvage each item or object and protect it from damage, then
promptly deliver it to Owner where directed.
1.8 INFORMATIONAL SUBMITTALS
A. Historic Treatment Subschedule:
1. Submit historic treatment subschedule within seven days of date established for
commencement of historic treatment work.
B. Preconstruction Documentation: Show preexisting conditions of adjoining construction and site
improvements, including finish surfaces, that might be misconstrued as damage caused by
Contractor's historic treatment operations.
C. Historic Treatment Program: Submit seven days before work begins.
D. Fire-Prevention Plan: Submit seven days before work begins.
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1.9 QUALITY ASSURANCE
A. Historic Treatment Specialist Qualifications: An experienced firm regularly engaged in historic
treatments similar in nature, materials, design, and extent to this work as specified in each
section and that has completed a minimum of five recent projects with a record of successful in -
service performance that demonstrates the firm's qualifications to perform this work.
1. Field Supervisor Qualifications: Full-time supervisors experienced in historic treatment
work similar in nature, material, design, and extent to that indicated for this Project.
Supervisors shall be on Project site when historic treatment work begins and during its
progress. Supervisors shall not be changed during Project except for causes beyond the
control of the specialist firm.
a. Construct new mockups of required work whenever a supervisor is replaced.
B. Historic Treatment Program: Prepare a written plan for historic treatment for whole Project,
including each phase or process and protection of surrounding materials during operations.
Describe in detail the materials, methods, and equipment to be used for each phase of work.
Show compliance with indicated methods and procedures specified in this and other Sections.
Coordinate this whole-Project historic treatment program with specific requirements of programs
required in other historic treatment Sections.
1. Dust and Noise Control: Include locations of proposed temporary dust- and noise-control
partitions and means of egress from occupied areas coordinated with continuing on -site
operations and other known work in progress.
2. Debris Hauling: Include plans clearly marked to show debris hauling routes, turning radii,
and locations and details of temporary protective barriers.
C. Fire-Prevention Plan: Prepare a written plan for preventing fires during the Work, including
placement of fire extinguishers, fire blankets, rag buckets, and other fire-prevention devices
during each phase or process. Coordinate plan with Owner's fire -protection equipment and
requirements. Include fire-watch personnel's training, duties, and authority to enforce fire safety.
D. Safety and Health Standard: Comply with ANSI/ASSE A10.6.
1.10 STORAGE AND HANDLING OF HISTORIC MATERIALS
A. Salvaged Historic Materials:
1. Clean loose dirt and debris from salvaged historic items unless more extensive cleaning
is indicated.
2. Pack or crate items after cleaning; cushion against damage during handling. Label
contents of containers.
3. Store items in a secure area until delivery to Owner.
4. Transport items to Owner's storage area on-site.
5. Protect items from damage during transport and storage.
B. Historic Materials for Reinstallation:
1. Repair and clean historic items for reuse as indicated.
2. Pack or crate items after cleaning and repairing; cushion against damage during
handling. Label contents of containers.
3. Protect items from damage during transport and storage.
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4. Reinstall items in locations indicated. Comply with installation requirements for new
materials and equipment unless otherwise indicated. Provide connections, supports, and
miscellaneous materials to make item functional for use indicated.
C. Existing Historic Materials to Remain: Protect construction indicated to remain a gainst damage
and soiling from construction work. Where permitted by Architect, items may be dismantled and
taken to a suitable, protected storage location during construction work and reinstalled in their
original locations after historic treatment and construction work in the vicinity is complete.
D. Storage: Catalog and store historic items within a weathertight enclosure where they are
protected from moisture, weather, condensation, and freezing temperatures.
1. Identify each item with a nonpermanent mark to document its original location. Indicate
original locations on plans, elevations, sections, or photographs by annotating the
identifying marks.
2. Secure stored materials to protect from theft.
3. Control humidity so that it does not exceed 85 percent. Maintain temperatures 5 deg F or
more above the dew point.
E. Storage Space:
1. Arrange for off-site locations for storage and protection of historic material that cannot be
stored and protected on-site. There shall be no storage of historic materials on site.
1.11 FIELD CONDITIONS
A. Size Limitations in Historic Spaces: Materials, products, and equipment used for performing the
Work and for transporting debris, materials, and products shall be of sizes that clear surfaces
within historic spaces, areas, rooms, and openings, including temporary protection, by 12
inches or more.
PART 2 - PRODUCTS - (Not Used)
PART 3 - EXECUTION
3.1 PROTECTION, GENERAL
A. Protect persons, motor vehicles, surrounding surfaces of building, building site, plants, and
surrounding buildings from harm resulting from historic treatment procedures.
1. Use only proven protection methods, appropriate to each area and surface being
protected.
2. Provide temporary barricades, barriers, and directional signage to exclude the public from
areas where historic treatment work is being performed.
3. Erect temporary barriers to form and maintain fire-egress routes.
4. Erect temporary protective covers over walkways and at points of pedestrian and
vehicular entrance and exit that must remain in service during historic treatment work.
5. Contain dust and debris generated by historic treatment work, and prevent it from
reaching the public or adjacent surfaces.
6. Provide shoring, bracing, and supports as necessary. Do not overload structural
elements.
7. Protect floors and other surfaces along hauling routes from damage, wear, and staining.
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8. Provide supplemental sound-control treatment to isolate removal and dismantling work
from other areas of the building.
B. Temporary Protection of Historic Materials:
1. Protect existing historic materials with temporary protections and construction. Do not
remove existing materials unless otherwise indicated.
2. Do not attach temporary protection to historic surfaces except as indicated as part of the
historic treatment program and approved by Architect.
C. Comply with each product manufacturer's written instructions for protections and precautions.
Protect against adverse effects of products and procedures on people and adjacent materials,
components, and vegetation.
D. Utility and Communications Services:
1. Notify Owner, Architect, authorities having jurisdiction, and entities owning or controlling
wires, conduits, pipes, and other services affected by historic treatment work before
commencing operations.
2. Disconnect and cap pipes and services as required by authorities having jurisdiction, as
required for historic treatment work.
3. Maintain existing services unless otherwise indicated; keep in service, and protect
against damage during operations. Provide temporary services during interruptions to
existing utilities.
E. Existing Drains: Prior to the start of work in an area, test drainage system to ensure that it is
functioning properly. Notify Architect immediately of inadequate drainage or blockage. Do not
begin work in an area until the drainage system is functioning properly.
1. Prevent solids such as stone or mortar residue or other debris from entering the drainage
system. Clean out drains and drain lines that become sluggish or blocked by sand or
other materials resulting from historic treatment work.
2. Protect drains from pollutants. Block drains or filter out sediments, allowing only clean
water to pass.
3.2 PROTECTION FROM FIRE
A. General: Follow fire-prevention plan and the following:
1. Comply with NFPA 241 requirements unless otherwise indicated.
2. Remove and keep area free of combustibles, including rubbish, paper, waste, and
chemicals, unless necessary for the immediate work.
a. If combustible material cannot be removed, provide fire blankets to cover such
materials.
3. Prohibit smoking by all persons within Project work and staging areas, in the building and
the entire site.
B. Heat-Generating Equipment and Combustible Materials: Comply with the following procedures
while performing work with heat-generating equipment or combustible materials, including
welding, torch-cutting, soldering, brazing, removing paint with heat, or other operations where
open flames or implements using high heat or combustible solvents and chemicals are
anticipated:
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1. Obtain Owner's approval for operations involving use of welding or other high -heat
equipment. Use of open-flame equipment is not permitted. Notify Owner at least 72
hours before each occurrence, indicating location of such work.
2. As far as practicable, restrict heat-generating equipment to shop areas or outside the
building.
3. Do not perform work with heat-generating equipment in or near rooms or in areas where
flammable liquids or explosive vapors are present or thought to be present. Use a
combustible gas indicator test to ensure that the area is safe.
4. Use fireproof baffles to prevent flames, sparks, hot gases, or other high -temperature
material from reaching surrounding combustible material.
5. Prevent the spread of sparks and particl es of hot metal through open windows, doors,
holes, and cracks in floors, walls, ceilings, roofs, and other openings.
6. Fire Watch: Before working with heat-generating equipment or combustible materials,
station personnel to serve as a fire watch at each loc ation where such work is performed.
Fire-watch personnel shall have the authority to enforce fire safety. Station fire watch
according to NFPA 51B, NFPA 241, and as follows:
a. Train each fire watch in the proper operation of fire-control equipment and alarms.
b. Prohibit fire-watch personnel from other work that would be a distraction from fire-
watch duties.
c. Cease work with heat-generating equipment whenever fire-watch personnel are
not present.
d. Have fire-watch personnel perform final fire-safety inspection each day beginning
no sooner than 30 minutes after conclusion of work at each area of Project site to
detect hidden or smoldering fires and to ensure that proper fire prevention is
maintained.
e. Maintain fire-watch personnel at each area of Project site until 60 minutes after
conclusion of daily work.
C. Fire Extinguishers, Fire Blankets, and Rag Buckets: Mainta in fire extinguishers, fire blankets,
and rag buckets for disposal of rags with combustible liquids. Maintain each as suitable for the
type of fire risk in each work area. Ensure that nearby personnel and the fire -watch personnel
are trained in fire-extinguisher and blanket use.
3.3 PROTECTION DURING APPLICATION OF CHEMICALS
A. Protect motor vehicles, surrounding surfaces of building being restored, building site, plants,
and surrounding buildings from harm or damage resulting from applications of chemicals and
adhesives.
B. Cover adjacent surfaces with protective materials that are proved to resist chemicals selected
for Project unless chemicals being used will not damage adjacent surfaces as indicated in
historic treatment program. Use covering materials and mas king agents that are waterproof and
UV resistant and that will not stain or leave residue on surfaces to which they are applied. Apply
protective materials according to manufacturer's written instructions. Do not apply liquid
masking agents or adhesives to painted or porous surfaces. When no longer needed, promptly
remove protective materials.
C. Do not apply chemicals during winds of sufficient force to spread them to unprotected surfaces.
D. Neutralize alkaline and acid wastes and legally dispose of off Owner's property.
E. Collect and dispose of runoff from chemical operations by legal means and in a manner that
prevents soil contamination, soil erosion, undermining of paving and foundations, damage to
landscaping, or water penetration into building interior.
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3.4 GENERAL HISTORIC TREATMENT
A. Have historic treatment work performed only by qualified historic treatment specialists.
B. Ensure that supervisory personnel are present when historic treatment work begins and during
its progress.
C. Record existing work before each procedure (preconstruction), and record progress during the
work. Use digital preconstruction documentation photographs or video recordings.
D. Perform surveys of Project Site as the Work progresses to detect hazards resulting from historic
treatment procedures.
E. Follow the procedures in subparagraphs below and procedures approved in historic treatment
program unless otherwise indicated:
1. Retain as much existing material as possible; repair and consolidate rather than replace.
2. Use additional material or structure to reinforce, strengthen, prop, tie, and support
existing material or structure.
3. Use reversible processes wherever possible.
4. Use historically accurate repair and replacement materials and techniques unless
otherwise indicated.
5. Record existing work before each procedure (preconstruction) and progress during the
work with digital preconstruction documentation photographs or video recordings.
F. Notify Architect of visible changes in the integrity of material or components whether from
environmental causes including biological attack, UV degradation, freezing, or thawing or from
structural defects including cracks, movement, or distortion.
1. Do not proceed with the work in question until directed by Architect.
G. Where missing features are indicated to be repaired or replaced, provide work with appearance
based on accurate duplications rather than on conjecture, subject to approval of Architect.
H. Where work requires existing features to be removed or dismantled and reinstalled, perform
these operations without damage to the material itself, to adjacent materials, or to the substrate.
I. Identify new and replacement materials and features with permanent marks hidden in the
completed Work to distinguish them from original materials. Record a legend of identification
marks and the locations of the items on record Drawings.
END OF SECTION
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02050-1
SECTION 02050
STRUCTURAL DISMANTLING
PART 1 - GENERAL
1.1 INCLUDED IN THIS SECTION
A. Dismantling of designated masonry, some of which is to be re-used.
B. Dismantling of additional masonry elements that have become loose.
1.2 RELATED SECTIONS
A. Section 02210 - Temporary Shoring and Bracing
B. Section 04100 - Masonry Restoration
1.3 REFERENCES
A. Comply with all similarly applicable demolition standards of the Connecticut Department
of Public Works.
B. Comply with all applicable OSHA requirements.
1.4 SUBMITTALS
A. Submit certificates attesting to legal disposal of refuse materials if requested by the
Engineer.
1.5 PROTECTION
A. Provide for the uninterrupted safety of workers and adjacent structures to remain as well
as the general public during all phases of the work. Provide warning signs, and
barricades as required to maintain a separated, safe, secure site.
B. Protect all elements which are to remain and all historic elements to be retained and/or
re-set. Do not dismantle anything other than what is specifically indicated on the contract
documents unless specifically requested to do so in writing by the Engineer.
PART 2 - PRODUCTS AND MATERIALS
2.1 PROVIDE PRODUCTS AND MATERIALS: which are incidental to the dismantling and demolition
work, disposing of these or salvaging them for re-use as best suits the project conditions.
PART 3 - EXECUTION
3.1 SITE REVIEW: Perform full review of site to verify extent of dismantling and to plan for
coordination with other trades.
3.2 DISMANTLE (REMOVE FROM PRESENT POSITION) THE FOLLOWING:
02050-2
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A. Masonry that has been designated to be removed.
B. Masonry that has loosened or shifted that is immediately contiguous to the designated
removal.
C. Gutters and flashing to allow masonry work.
3.3 DISMANTLING OPERATIONS
A. Carefully study each item to be dismantled and determine the safest, least disturbing and
potentially damaging method of disassembly.
B. Dismantle the specific items and store items designated for re-use or salvage in a safe
place.
D. Notify the Engineer immediately if any damage has occurred to any of the dismantled
items and propose appropriate methods of repair.
3.4 RETENTION OF MATERIALS
A. Retain and protect dismantled brown sandstone pediment units for use as harvesting
source for repair dutchmen.
END OF SECTION
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HISTORIC REMOVAL AND DISMANTLING 02051 - 1 of 5
SECTION 02051
HISTORIC REMOVAL AND DISMANTLING
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 1 Specification Sections, apply to this Section.
1.2 SUMMARY
A. Section includes historic treatment procedures in the form of special types of selectiv e
demolition work for designated historic spaces, areas, rooms, and surfaces and the following
specific work:
1. Removal and disposal of existing ridge cap flashing.
2. Removal and disposal of damaged slate shingles as indicated.
3. Removal and disposal of damaged roof deck boards as indicated.
4. Removal and disposal of metal flashing as indicated.
B. Related Requirements:
1. Section 01351 "Historic Treatment Procedures" for general historic treatment
requirements.
2. Section 07315 “Slate Shingles.”
3. Section 07620 “Sheet Metal Flashing and Trim.”
1.3 DEFINITIONS
A. Dismantle: To disassemble or detach a historic item from a surface, or a nonhistoric item from a
historic surface, using gentle methods and equipment to prevent damage to historic items and
surfaces; disposing of items unless indicated to be salvaged or reinstalled.
B. Existing to Remain: Existing items that are not to be removed or dismantled, except to the
degree indicated for performing required Work.
C. Remove: To take down or detach a nonhistoric item located within a historic space, area, or
room, using methods and equipment to prevent damage to historic items and surfaces;
disposing of items unless indicated to be salvaged or reinstalled.
D. Retain: To keep existing items that are not to be removed or dismantled.
E. Salvage: To protect removed or dismantled items and deliver them to Owner.
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1.4 PRECONSTRUCTION MEETINGS
A. Preconstruction Conference: Conduct conference at Project site.
1. Review minutes of Preliminary Historic Treatment Conference that pertain to removal and
dismantling procedures and protection of historic areas and surfaces.
2. Review list of items indicated to be salvaged.
3. Verify qualifications of personnel assigned to perform removal and dismantling.
4. Inspect and discuss condition of each construction type to be removed or dismantled.
5. Review requirements of other work that depends on condition of substrates exposed by
removal and dismantling work.
6. Review methods and procedures related to removal and dismantling work, including, but
not limited to, the following:
a. Historic removal and dismantling specialist's personnel, equipment, and facilities
needed to make progress and avoid delays.
b. Materials, material application, sequencing, tolerances, and required clearances.
c. Fire prevention.
d. Coordination with building occupants.
1.5 INFORMATIONAL SUBMITTALS
A. Qualification Data: For historic removal and dismantling specialist and historic removal and
dismantling specialist's field supervisors.
B. Preconstruction Documentation: Show preexisting conditions of adjoining construction and site
improvements, including finish surfaces, that might be misconstrued as damage caused by
Contractor's removal and dismantling operations.
C. Removal and Dismantling Historic Treatment Program: Submit 30 days before work begins.
D. List of Items Indicated to Be Salvaged: Prepare a list of items indicated on Drawings to be
salvaged for Owner's use or for reinstallation. Submit 15 days before precon struction
conference.
E. Inventory of Salvaged Items: After removal or dismantling work is complete, submit a list of
items that have been salvaged.
1. Include item description, item condition, number of items if more than one of a type, and
tag number. Include photo of item in original location.
2. As work proceeds, include on the inventory items that were indicated to be salvaged and
items of historic importance discovered during the work. Document reasons, if any, why
an item indicated to be salvaged was not salvaged.
1.6 QUALITY ASSURANCE
A. Historic Removal and Dismantling Specialist Qualifications: A qualified historic treatment
specialist. General selective demolition experience is insufficient experience for historic removal
and dismantling work.
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HISTORIC REMOVAL AND DISMANTLING 02051 - 3 of 5
B. Removal and Dismantling Historic Treatment Program: Prepare a written, detailed description of
materials, methods, equipment, and sequence of operations to be used for each phase of
removal and dismantling work, including protection of surrounding and subs trate materials and
Project site.
1. Dust and Noise Control: Include locations of proposed temporary dust- and noise-control
partitions and means of egress from occupied areas coordinated with continuing on -site
operations and other known work in progress.
2. Debris Hauling: Include plans clearly marked to show debris hauling routes, turning radii,
and locations and details of temporary protective barriers.
C. Mockups: Prepare mockups of specific historic removal and dismantling procedures specified in
this Section to demonstrate aesthetic effects and to set quality standards for materials and
execution.
1. Approval of mockups does not constitute approval of deviations from the Contract
Documents contained in mockups unless Architect specifically approves such deviat ions
in writing.
D. Regulatory Requirements: Comply with notification regulations of authorities having jurisdiction
before beginning removal and dismantling work. Comply with hauling and disposal regulations
of authorities having jurisdiction.
1.7 FIELD CONDITIONS
A. Conditions existing at time of inspection for bidding purpose will be maintained by Owner as far
as practical.
B. Notify Architect of discrepancies between existing conditions and Drawings before proceeding
with removal and dismantling work.
C. Hazardous Materials: Hazardous materials may be present in construction affected by removal
and dismantling work.
1. Do not disturb hazardous materials or items suspected of containing hazardous
materials, except under procedures specified elsewhere in the Contract Documents.
2. If unanticipated asbestos is suspected, stop work in the area of potential hazard, shut off
fans and other air handlers ventilating the area, and rope off area until the questionable
material is identified. Reassign workers to continue work in unaffected areas. Resume
work in the area of concern after safe working conditions are verified.
D. Storage or sale of removed or dismantled items on-site is not permitted unless otherwise
indicated.
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HISTORIC REMOVAL AND DISMANTLING 02051 - 4 of 5
PART 2 - PRODUCTS - (Not Used)
PART 3 - EXECUTION
3.1 HISTORIC REMOVAL AND DISMANTLING EQUIPMENT
A. Removal Equipment: Use only hand-held tools, except as follows or unless otherwise approved
by Architect on a case-by-case basis:
1. Light jackhammers are allowed subject to Architect's approval.
2. Large air hammers are not permitted.
B. Dismantling Equipment: Use manual, hand-held tools, except as follows or otherwise approved
by Architect on a case-by-case basis:
1. Hand-held power tools and cutting torches are permitted only as submitted in the historic
treatment program. They must be adjustable so as to penetrate or cut only the thickness
of material being removed.
2. Pry bars more than 18 inches long and hammers weighing more than 2 lb are not
permitted for dismantling work.
3.2 EXAMINATION
A. Preparation for Removal and Dismantling: Examine construction to be removed or dismantled to
determine best methods to safely and effectively perform removal and dismantling work.
Examine adjacent work to determine what protective measures are necessary. M ake
explorations, probes, and inquiries as necessary to determine condition of construction to be
removed or dismantled and location of utilities and services to remain that may be hidden by
construction that is to be removed or dismantled.
1. Verify that affected utilities are disconnected and capped.
2. Inventory and record the condition of items to be removed and dismantled for
reinstallation or salvage. Enter this information on the submittal of inventory of salvaged
items.
3. Before removal or dismantling of existing building elements that will be reproduced or
duplicated in final Work, make permanent record of measurements, materials, and
construction details required to make exact reproduction.
4. Engineering Survey: Engage a professional engineer to survey condition of building to
determine whether removing any element might result in structural deficiency or
unplanned collapse of any portion of structure or adjacent structures as a result of
removal and dismantling work.
B. Survey of Existing Conditions: Record existing conditions by use of preconstruction
photographs.
1. Comply with requirements specified in Section 01 32 33 "Photographic Documentation."
C. Perform surveys as the Work progresses to detect hazards resulting from historic removal and
dismantling procedures.
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3.3 HISTORIC REMOVAL AND DISMANTLING
A. General: Have removal and dismantling work performed by a qualified historic removal and
dismantling specialist. Ensure that historic removal and dismantling specialist's field supervisors
are present when removal and dismantling work begins and during its progress.
B. Perform work according to the historic treatment program and approved mockup.
1. Perform removal and dismantling to the limits indicated.
2. Provide supports or reinforcement for existing construction that becomes temporarily
weakened by removal and dismantling work, until the Project Work is completed unless
otherwise indicated.
3. Perform cutting by hand or with small power tools wherever possible. Cut holes and slots
neatly to size required, with minimum disturbance of adjacent work.
4. Do not operate air compressors inside building unless approved by Architect in each
case.
5. Do not drill or cut columns, beams, joints, girders, structural slabs, or other structural
supporting elements, without having Contractor's professional engineer's written approval
for each location before such work is begun.
6. Dispose of removed and dismantled items off-site unless indicated to be salvaged or
reinstalled.
C. Water-Mist Sprinkling: Use water-mist sprinkling and other wet methods to control dust only with
adequate, approved procedures and equipment according to the historic treatment program to
ensure that such water does not create a hazard or adversely affect other building areas or
materials.
D. Unacceptable Equipment: Keep equipment that is not permitted for historic removal or
dismantling work away from the vicinity where such work is being performed.
E. Removing and Dismantling Items on or Near Historic Surfaces:
1. Use only dismantling equipment and procedures within 12 inches of historic surface. Do
not use pry bars. Protect historic surface from contact with or damage by tools.
2. Unfasten items in the opposite order from which they were installed.
3. Support each item as it becomes loosened to prevent stress and damage to the historic
surface.
4. Dismantle anchorages.
F. Anchorages:
1. Remove anchorages associated with removed items.
2. Dismantle anchorages associated with dismantled items.
3. In nonhistoric surfaces, patch holes created by anchorage removal or dismantling
according to the requirements for new work.
4. In historic surfaces, patch or repair holes created by anchorage removal or dismantling
according to Section that is specific to the historic surface being patched.
END OF SECTION
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02210-1
SECTION 02210
TEMPORARY SHORING AND BRACING
PART 1 - GENERAL
1.1 INCLUDED IN THIS SECTION
A. Detailing and installation of all required temporary shoring, bracing and support to enable
the specified masonry reconstruction and restoration to be completed in a safe and
expedient manner.
1.2 REFERENCES
A. Comply with the following standard material specifications that apply to the materials
used.
1.3 SUBMITTALS
A. Submit the following items to the Engineer for review:
1. Drawings showing shoring, bracing, and temporary supports.
2. A written sequence of all phases of significant structural operations and related
temporary support.
1.4 QUALITY ASSURANCE
A. Comply with all referenced standards for the products employed.
B. Schedule all appropriate site visits and inspections.
PART 2 - PRODUCTS
2.1 MATERIALS AND PRODUCTS
A. Products and materials that are appropriate to the application and permitted by the
Massachusetts State Building Code.
PART 3 - EXECUTION
3.1 TEMPORARY SHORING, BRACING AND PROTECTION
A. The contractor shall be solely responsible for all means and methods of construction
employed on this project including all temporary bracing, support and protection of the
existing Structure. Contractor shall be prepared to retain the services of a
Massachusetts registered professional structural engineer at his own expense if
necessary in order to maintain safe and stable conditions on the project. Any sequences
of work or methods indicated or implied in the cont ract documents are present only as
assumptions on which the design of the permanent installations was based and are to be
considered as a suggested option for review by the contractor.
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02210-2
B. Field Survey and Analysis:
1. Field-verify indicated shoring locations and measure all existing geometry and
note existing conditions. Locate points of attachment and support that will best
suit progress of work.
2. Perform a structural analysis of the areas to be affected by the work and
determine loads on temporary shoring, bracing and support system.
C. Design Shoring, Bracing and Protection:
1. Shoring and bracing shall be designed to maintain the stability and existing
elements without deflection during work. Design shall be in accordanc e with
gravity dead, live and wind load resistance requirements of the Massachusetts
State Building Code and referenced standards.
2. Shoring and bracing shall be sufficient for existing and new material loads and
anticipated construction loads.
3. Shoring and bracing shall allow for distribution of loads to supporting structure
and shall limit all movement to less than 1/16" at full loading. Stresses on
supporting structure shall not exceed safe, commonly allowable stresses for the
materials in consideration of their age and conditions. Bending members shall
allow deflections of not more than the span lengths divided by 720 at full loading.
4. Protection shall be detailed to protect the remaining structure, its contents, and
the immediate environs against damage from falling projectiles, debris and/or
soiling that is related to or a result of any of the operations that are part of this
project. This shall include barricades, shields, tarpaulins, scrims and restraining
devices, along with any other devices and structures as may be needed to
provide safe protection. All structures shall be detailed and constructed to
withstand all possible live, snow, wind and impact loads without failure.
D. Construct shoring, bracing and protection in accordance with approved submittals and
proper and standard construction practice. Work shall be installed so as not to
permanently mar or stain the exposed stone face s of the structure.
E. Maintenance: Maintain shoring, bracing and support in a safe condition during all phases
of work. Keep wood generally dry and at constant moisture content. Protect wood from
swelling or shrinking with weather and humidity fluctuations.
F. Removal: Remove all shoring and bracing after surrounding work is complete and
masonry has adequately cured to support itself. Remove all temporary inserts and clean
all contact surfaces and plug all holes per applicable requirements of Section 04500 –
Masonry Restoration.
END OF SECTION
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SECTION 04100
MASONRY RESTORATION
PART 1 - GENERAL
1.1 INCLUDED IN THIS SECTION
A. The following items of work as described in the construction documents:
1. Replacement of damaged stone units with harvested brownstone and new cast
stone.
2. Pinning and grouting of collar joint cracks.
3. Grouting of wall cracks.
1.2 SCOPE OF WORK
A. The base bid shall include all masonry work, the nature and quantities of which are
detailed and described herein and on the Contract Drawings.
B. The masonry Contractor shall be responsible for coordinating and insuring that all
flashing and weep holes are installed.
1.3 RELATED SECTIONS
A. Section 02050 - Structural Dismantling
B. Section 02210 - Shoring, Bracing and Protection
C. Section 04720 – Unit Cast Stone
D. Section 04730 – Unit Brownstone
1.4 SUBMITTALS
A. Submit the following items to the Engineer for review:
1. Test reports required as per paragraph 1.5 - Quality Control.
2. Grout mix design where needed.
3. Samples of new structural pointing and patching mortars and grouts cured in
same fashion as will be applied to structure.
4. 24”x24” raking (joint cutting) test/sample patches for (as preparation for
repointing work) to be provided by the Contractor at exterior and interior wall
surfaces and located as agreed with Engineer on site. No raking or joint cutting
shall be started until samples are approved.
5. 24”x24” pointing / repointing test/sample patches to be provided by the
Contractor at exterior and interior wall surfaces and located at agreed with the
Engineer on site. No repointing shall be started until samples are approved.
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6. Four completed hole and plug mortar applications to simulate completed retrofit
facing tie installations.
1.6 QUALITY CONTROL
A. Comply with all referenced standards for the products employed.
B. Coordinate times of Special Inspections to comply with International Existing Building
Code.
C. During periods of cold or questionable weather, keep a log of work including air
temperature and weather conditions, work started and completed per day, and tests
taken. No work shall be done when the ambient temperature of the structure or the airis
less than 45 degrees F.
D. Produce mortar and grout samples in the form of 2" x 2” x 2” flat slabs, placed against
wooden side forms and backing, for easy removal of cur ed sample. Provide 8 samples
per mortar and grout type taken on different days and cured under conditions that match
field conditions to testing laboratory for compression testing. Provide at least four 2" x 2"
x 2" field cut samples of existing mortar to the testing laboratory for comparative
compression testing. Contractor shall arrange for and pay for all testing and shall submit
results at 7 days and at 28 days to the Engineer. Adjustments in mix and re -tests shall
be made as required at no additional c ost to the owner. Test existing mortar samples
and trial mixes at least three weeks before commencing masonry work.
E. Masonry Contractor shall be a qualified, well -referenced brick and stone mason with at
least 10 years of experience in stone construction, repair, and restoration.
PART 2 - PRODUCTS
2.1 MASONRY UNITS
A. Cast Stone: Provided in accordance with Section 04720- Unit Cast Stone.
B. Salvaged Brownstone: Harvested from larger natural stone units and fabricated in
accordance with Section 04730- Unit Brownstone.
2.2 MORTAR AND GROUT
A. Provide mortar in accordance with ASTM C1713 “Proportion Specification” in the following
formulations. Provide other products meeting ASTM C1713 as well as crack filling grout
mixes which shall be fluidified versions of C1713 compliant mortars.
1. Mortar for exposed masonry for Setting and Pointing of reconstructed stonework
shall be shall be 1 part type I or II Portland Cement, 1 parts Hydrated Lime and 6
parts Bulked Sand. Sand shall be properly selected and blended to match the color,
texture and appearance of the existing mortar sand, and when used, Portland
Cement shall be a combination of white and gray cement that bests suits the color
matching of the existing mortar binder. Where additionally needed, up to 10% by
mineral oxide pigment by weight of binder may be added to best match the color of
the original mortar. Pigments shall be chemically pure mineral oxides, alkali proof
and light fast, and shall be equal or equivalent to “Solomon Grind” as manufactured
by Chem Services Inc, of Springfield, IL.
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2. Mortar for exposed masonry for Repointing of stonework to remain shall be shall be
1 part type I or II Portland Cement, 2 parts Hydrated Lime and 9 parts Bulked Sand.
Sand shall be properly selected and blended to match the color, texture and
appearance of the existing mortar sand, and when used, Portland Cement shall be a
combination of white and gray cement that bests suits the color matching of the
existing mortar binder. Where additionally needed, up to 10% by mineral oxide
pigment by weight of binder may be added to best match the color of the original
mortar. Pigments shall be chemically pure mineral oxides, alkali proof and light fast,
and shall be equal or equivalent to “Solomon Grind” as manufactured by Chem
Services Inc, of Springfield, IL.
3. Restoration Grout shall be equal or equivalent to VoidSpan PHLc Grout, as
supplied by VoidSpan Technologies, LLC of Salem, MA (800-966-VOID).
B. Portland Cement: Type I, II or IIA white and/or gray cement as follows: ASTM C150
complying with staining requirements of ASTM C91 for not more than 0.03% water
soluble alkali. Mortar shall show no efflorescence when cast in a 2” x 7” x ½” slab
consisting of1 part of the cement to be used, 2 parts Ottawa plastic mortar sand and
distilled water, and subjected to a 7 day “wick test” conforming to ASTM C67.
C. Hydrated Lime: ASTM C207, Type S.
D. Fine Aggregate / Sand:
1. Sand for mortar and grout: ASTM C144, washed. “Bulk” or moisten sand before
mixing with binder (proportions based on damp sand).
a. Sand for use in exterior-exposed pointing or re-pointing mortar and for
plug and filler mortar shall match the sand of the ori ginal, exposed
mortar.
2. For surface fill: Clean, fine sand free of salts.
E. The contractor shall review the water content and any required adjustments along with
proposed products with the Engineer. Contractor shall then submit a record mortar mix
design along with product data sheets to the Engineer for verification, review and approval
before beginning any mixing or installation.
F. Thoroughly mix mortar ingredients in accordance with ASTM C270 in quantities needed for
immediate use.
G. Mix grout in accordance with ASTM C94 or thoroughly mix grout ingredients in quantities
needed for immediate use in accordance with ASTM C476 Fine or Course grout.
H. Do not use anti-freeze compounds to lower the freezing point of grout.
I. Restoration Grout: VoidSpan PHLc Gravity Feed Grout as supplied by VoidSpan
Technologies, LLC of Salem, MA (disclosure: VoidSpan is owned by the same party as
Structures North).
2.3 REINFORCEMENT, ANCHORAGE AND ADHESIVE PRODUCTS
A. Cintec Sock Anchors shall be as manufactured by Cintec America, available through
Conspec Associates of East Haven, CT.
B. Helefix Dryfix Anchors shall be as manufactured by Halfen, USA, and available through
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Conspec Associates of East Haven, CT.
C. Provide stainless steel ties and anchors for the tie-back to stone construction meeting the
requirements of ASTM A276, Type 304/316.
D. Adhesive Anchoring System for Miscellaneous Embedded Items (where indicated on the
Contract Drawings as “Adhesive Anchors”):
1. For anchorage to masonry (except as noted below under #2 or 3): Hilti HY200
Adhesive Injection System with properly sized Screen Tubes as manufactured by
the HILTI Corporation of Tulsa, OK.
2. For anchorage to large, non-porous solid masonry units (w/out crossing voids or
cavities): Hilti RE500 Adhesive Injection System as manufactured by the HILTI
Corporation of Tulsa, OK or Sikadur Injection Gel as manufactured by the Sika
Corporation of Lyndurst, NJ.
E. Adhesive Anchoring System for Miscellaneous Embedded Items (where indicated on the
Contract Drawings as “Adhesive Anchors”):
1. For anchorage to masonry (except as noted below under #2 or 3): Hilti HY20
Adhesive Injection System with properly sized Screen Tubes as manufactured by
the HILTI Corporation of Tulsa, OK.
2. For anchorage to large, non-porous solid masonry units (w/out crossing voids or
cavities): Hilti RE 500 Adhesive Injection System as manufactured by the HILTI
Corporation of Tulsa, OK or Sikadur Injection Gel as manufactured by the Sika
Corporation of Lyndurst, NJ.
3. For pinning of stone dutchmen or fragments to parent units: Sikadur Injection Gel
as manufactured by the Sika Corporation of Lyndhurst, NJ.
2.4 MISCELLANEOUS
A. Mortar Washdown Cleaner:
1. For Pigmented Mortar - Equal or equivalent to “Vanatrol” as
manufactured by ProSoCo Inc. of Lawrence, KS.
2. For Unpigmented Mortar- Equal or equivalent to “Sureclean 600” as
manufactured by ProS oCo Inc. of Lawrence, KS.
B. Helical Wall Ties shall be Helifix or equivalent as supplied by Halfen USA.
C. Sealant and Backer Rods
1. Provide closed cell backer rod at all sealant joints. Backer rod shall be carefully
sized per sealant manufacturer instructions for each joint.
2. Provide 2-component polyurethane complying with ASTM C -920 and Federal
Specification TT-S-00227E.
3. Acceptable manufacturers: Sika, Tremco or equivalent product line.
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PART 3 - EXECUTION
3.1 DISMANTLING OF DESIGNATED MASONRY
A. Mark removal lines and provide temporary support and protection to adjacent work to
remain. Maintain existing structure in safe condition at all times.
B. Evaluate each piece of stonework in place and determine the best, most gentle
method(s) of removal for each unit. Locate and cut any anchors that are holding the units
in place, providing support to the units while the anchors are being detached or cut so
that the units do not fall or become stressed. If any of the units are found to be
“headered” or irremo vably locked into the back -up construction, stop removal work, brace
the unit and notify the Engineer of the condition.
3.2 RESTORATION OF EXISTING BACK -UP MASONRY TO REMAIN
A. Remove all loose masonry units, mortar and residue from surface of back-up construction
without disturbing or weakening or destabilizing the masonry. Employ a "pressure
washer" and regulate the nozzle pressure to clean but not damage the surfaces. Nozzle
pressure shall be in the range of 600 psi with a 15 degree fan at the tip.
B. Identify and remove loose units and re -set them with new mortar slushed into
surrounding voids. Add bricks as may be appropriate to re -stitch the wall to a sound,
unfragmented condition.
1. Locate damaged and/or loose brick or stone units to be removed. Pull unit(s) out
of wall with a gentle rocking action, driving wedges into surrounding joints only as
required to snap this joint off. Stones shall be removed one at a time, bricks may
be removed up to 4 at a time.
2. Set new replacement brick units into wall in orientation and locations of existing
damaged units. Pre-wet existing construction and fully butter all contact surfaces
of new units during setting, striking mortar at distance of 1” back from the ashlar
face of the masonry to allow for final tuck pointing.
C. Grout-inject cracks and small voids encountered in masonry to remain per the
requirements of this Section.
D. Fill hollow cavities encountered in existing masonry to remain with extended lime -cement
grout or mortar per the requirements of this Section.
E. Inspect all joints and rake deteriorated or softened mortar joints to a minimum depth of 1”,
or as deeply as necessary to reach sound mortar, but not to exceed one half of the
thickness of the joint without supplementary means of support. Employ tools that are
sharp and will completely cut out joints at intersections without splitting or damag ing
stones. Drive hardwood shims into joints that will be cut more deeply than 1 ½” to
prevent the wall construction from shifting.
F. Moist-cure all work under a tarpaulin or plastic sheets. Following curing period, maintain
weather protection to interior of structure until exterior wall system is replaced.
G. Work under this subsection shall only be done when the ambient air, material,and
substrate temperatures are above 40 degrees F. by 9:00 AM and rising.
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3.3 INSTALLATION OF ADHISIVE ANCHORS, PINS AND RODS
A. Install Adhesive-Set pins, connectors and dowels as shown on the Contract Drawings
and as described below using the applicable Injection System.
1. Carefully drill holes of the proper oversize diameter for the screen tube (in
masonry) and for injection resin or sealants 1/8" larger in diameter than the
anchor rod or pin, or as indicated on the Drawings or specified by the
manufacturer of the injection system if different.
2. Locate and size anchors and pins in as indicated in the Contract Documents and
as needed per Engineer’s field instructions following exposure of hidden
conditions.
3. Provide embedments as noted or instructed but not less than 8” embedment at
½” diameter and larger anchors or 4” embedment at a nchors of less than ½’
diameter.
4. Incrementally core-drill all holes being careful not to damage or loosen substrate
and being careful to avoid embedded metal if any.
5. Simultaneously with injection of holes, pre -butter rods’ surfaces with injection
resin so that there is a uniform coating all around the rod of between 1/16” and
1/8” in thickness and insert rods immediately thereafter.
6. Wipe off excess resin and clean out remaining hole depth. Do not allow resin to
leak out of holes and stain stone surface(s). Remove resin immediately if this
happens!
7. Monitor progress and quality of work, adjusting techniques as may be necessary
with approval of the Engineer. Check that annular space is filled around the end
of each rod following insertion. If properly installed, resin should be oozing out
beyond end of rod all around annular space, showing that the annular space and
the hole are completely filled. Supplementary injection may be necessary due to
the presence of voids.
8. Work under this subsection shall only be done when the ambient air, materia l,
and substrate temperatures are above 40 degrees F. by 9:00 AM and rising.
3.4 INSTALLATION OF DRY -SET WALL TIES INTO EXISTING BRICK MASONRY
A. The following work shall be performed by an experienced mason who had at least 10
years of practical experience with work on older brick and stone structures and who has
been successfully trained in the installation of the “Helifix” system. The following
requirements apply to anchoring of existing veneers and wythes to back -up masonry.
C. Carefully drill lead holes through external veneer of wall and into back-up masonry to the
depths and diameters specified in the general notes on the contract drawings and in the
spacing(s) and arrangement(s) indicated on the wall elevations or by the Architect.
1. Locate holes within the faces of masonry units so that they are at least ¾” of all free
edges of brick units, 2” from all free edges of stone units and 3” from the nearest
crack or spall.
2. Monitor Conditions of brick as the drill is advancing into the wall. Check for vibration
or movement of brick units halfway through each by ta pping with the bit. Notify the
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Architect / Engineer if the brickwork feels “soft”.
3. Incline the lead holes at an angle of 30 degrees from perpendicular in the vertical and
horizontal directions. Randomly vary the direction of each lead hole over the wall
area so that all four directions have been included.
D. Anchor Installation: Install Anchors as follows:
1. Place end of “Helifix” anchor at hole and vibrate into hole using a rotary hammer with
“Helifix” installation tool that fits around the anchor to brace it against buckling during
installation.
2. Change tools during advance of anchor to successively shorter lengths but not too
short that anchor will buckle.
3. Complete anchor installation using finishing tool to set end of anchor into veneer with
1/4” to ½” recess.
4. Install anchors in quantity arrangement and size as indicated on the contract
documents following any required adjustments in lead hole diameter and following
completion of trial load test procedure.
E. Fill installation holes in exterior veneer with matchin g “plug mortar”.
F. Additional Limitations on Drilling: Do not drill more than ten holes on any given wall
surface until at least 5 consecutive anchors have been completely and satisfactorily
installed 3 consecutive trial load test have been successfully completed on that wal l
surface. If the 5 successful installations and 3 successful load tests have not been
completed, then the lead holes may either be to small (anchors bending during
installation) or too large (anchors pulling out under load). Stop work and notify
Manufacturer’s representative and Architect to modify lead hole diameter. See Item F for
load test procedure.
F. Trial Load Test Procedure: Drill 3 initial lead holes in each type of veneer installation and
perform 3 pull-out load tests using the procedure set for th by the manufacturer and as
follows: install test anchor 3 3/4” into veneer and place test gage around anchor to press
against wall surface. Place test cap on anchor and screw tight. Apply test load of at
least 250 lbs on anchor and adjust following initial creep. Sustain test load for 2 minutes
and release. Complete installation load tested anchor after completion o f test.
C. Work under this subsection shall only be done when the ambient air, material,and
substrate temperatures are above 40 degrees F. by 9:00 AM and rising.
3.5 INSTALLATION OF CINTEC ANCHORS
A. Install Cintec Anchors in accordance with the following:
1. Coordinate design and installation of Cintec anchoring system with manufacturer.
a. Forward contract drawings, required load information and description of conditions to a
representative of Cintec America, Inc. and arrange site visit to observe existing
conditions and review installation.
b. Cintec America shall provide written verification of design load and installation and
shall provide additional installation requirements and instructions. Submit to Engineer
for review before proceeding with installation. Adjustments shall be made if neces sary
to the anchor design at no additional cost to the owner but no adjustments shall be
made in diameter of rod nor reduction in embedment.
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c. Satisfy Cintec contractor training and certification requirements and successfully
complete at least 4 trial anchor installations in field satisfaction of a qualified Cintec
representative (unless more are required to obtain certification).
d. Successful trial installations may be used as permanent installations.
2. Install anchors in arrangement indicated on the contract drawings and by the size indicated
on the contract drawings and verified or modified by the manufacturer in accordance with
the approved procedures. Coordinate anchor rod installation and layout with layout and
installation of connected members and within required tolerances. Provide sufficient
thread length and clearance for attachments where required. Cut-off or remove grouting
ports following installation.
3.6 GROUT INJECTION OF CRACKS AND CAVITIES IN EXSTING MASONRY TO REMAIN
A. The following pertains to grout injection of structural cracks of up to 2" in width.
B. Mechanically widen outer edges of structural cracks and drill ¼” diameter holes at 6” to
12” o.c. and install grouting ports. Seal surface of crack and around ports with removable
sealant or jute. Leave bottom 4” of crack open and seal after water flushing. Removable
Crack Seal for cementitious grouting shall be placed on both sides of the wall or crack to
be injected.
C. Flood crack with water at 10 psi maximum pressure and allow deleterious materials and
any sand or masonry residue to flow out at bottom. Seal remaining drainage opening at
bottom of crack with removable Crack Seal for cementitious grouting.
D. Pressure-inject grout into crack, starting at bottom and progressin g upward until all ports
are filled and plugged. Injection shall be performed within 30 minutes of water saturation
but after all free water has run out. Injection pressure shall not exceed 10 psi. Lifts shall
not exceed 48” in height.
E. Remove ports and removable Crack Seal and inspect penetration of crack. Begin
remainder of restoration work if acceptable, or re -inject if not well penetrated
F. At collar joint cracks, pre -dampen and then gravity feed grout into the tops of the cracks
in 24” max lifts until filled.
G. Work under this subsection shall only be done when the ambient air, material, and
substrate temperatures are above 40 degrees F. by 9:00 AM and rising.
3.7 REPLACEMENT OF STONEWORK
A. At bed joints, add lead shims as needed to help float large units without squeezing out
the mortar. Install stone anchors at proper alignments and stack ne xt courses of units
properly over them. Incorporate cotton chord weeps as indicated . Tool the interior edge
of the mortar bedding at cavities to provide “shed joints” at a 1:1 slope, keeping the weep
extensions clear of mortar. Incorporate flashing where indicated, providing solid bedding
below the flashing to minimize “oil canning”.
B. Install ties and connectors to hold stones in place, looping these where indicated around
reinforcing steel cages, being careful not to mar the epoxy coating so as to keep th e
stainless steel galvanically separated from the protected non-stainless reinforcing steel.
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C. At head joints, fill the gaps between stone ends solidly with mortar, using backer rods at
the interior edges of cavity construction if needed. Add slate shims if greater than 1”
thickness, in order to minimize shrinkage and sloughing.
D. At bonded collar joints, hand rub a mortar paste slurry over the contact surfaces of the
stone to be set and pre-butter depressions which are deeper than 1/4" to provide a non-
concave surface.
E. Stones shall be re-set to within ¼” of their previous positions and surface alignment, with
individual joints’ widths along all sides within 1/8” of their cumulative av erage width per
stone.
F. Install all indicated stainless steel anchors, pints and ties to reinforce the cores of
buttresses and pinnacles, and to laterally tie out wythes of walls.
G. Strike outer joints at a recessed depth of 2 ½ times the joints’ widths from the
surrounding masonry and provide dovetail transitions to existing surrounding joints and to
those that are to be re-pointed or removed.
H. Conventionally mortar fill tied collar joints behind facing stones by packing sufficient stone
chinkers into the joint in order that no unchinked mortar thickness exceed 5/8”.
Alternatively, collar joints may be gravity -filled with PHLc grout. Grout may be amended
with up to 1/3 washed pea ston e aggregate by volume.
I. Reconstruct reinforced cores of buttresses and pinnacles by one of the following
methods:
a. Conventionally reconstruct using original stones and sufficient chinking stones to
limit the maximum unchinked mortar thickness to 5/8”.
b. Loosely dry stack up to three feet of angular stone at a time with sufficient
pathways for the flow of grout, then gravity feed PHLc grout into the cores tofully
surround the dry-stacked stone.
J. Finish point outer surfaces of the joints to match surrounding work after not less than 24
hours from the setting of the stones and filling of the joints.
K. Work under this subsection shall only be done when the ambient air, material,and
substrate temperatures are above 40 degrees F. by 9:00 AM and rising.
3.8 RE-SETTING TOLERANCES
A. Maximum Variation from Plane of Wall: 1/4" in 10 feet or as required by elevator clearances.
B. Maximum Variation from Plumb: 1/4" per story non-cumulative, 1/2" total, or as required by
elevator clearances.
C. Maximum Variation from Level Coursing: 1/8" in 4 feet, 1/4" in 10 feet.
D. Maximum Variation of Joint Thickness: 1/8".
3.9 PREPARATION OF JOINTS FOR REPOINTING
A. Rake mortar joints in existing construction in areas designated to be repointed to a
minimum depth of 2.5 times the mortar joint width, 1", oras deeply as necessary to reach
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sound mortar (whichever is greatest), but not to exceed one half of the thickness of the
stone thickness without supplementary means of support. Employ tools that are sharp
and will completely cut out joints at intersections without splitting or damaging s tones or
bricks. Raking work shall match the approved test sample.
B. Gently drive wedges or hardwood shims into wide, deep cracks in masonry where there
is a possibility that the vertical and in -plane lateral support of masonry work will be
compromised during deep raking of the joints. This should at least be done where more
than half of the length of a specific joint is removed to a depth of more than one third of
the thickness of the stone.
C. Cut flashing reglets in new or existing masonry as indicated on t he Contract Drawings.
D. Wire brush clean and then pre -wet the joints and allow for the existing mortar to dry or
saturate to a dull, non-glossy finish immediately before applying new mortar.
3.10 FINISH POINTING
A. Pre-wet prepared mortar joint surfaces until they are saturated but surface dry. At
flashing reglets, verify that flashing has been fully installed and is stable.
B. Apply final "tuck" lift of tuck pointing mortar and strike -off for flush surface.
C. Install lead weathercaps at sky -facing joints as indicated.
D. Moist cure all work, spraying with a water mist and cover with damp cloth or tarpaulin.
E. Clean mortar from all surfaces following completion and curing of work.
F. Work under this subsection shall only be done when the ambient air, material,and
substrate temperatures are above 40 degrees F. by 9:00 AM and rising.
G. The Contractor shall be responsible for matching the joints of the mock -up surrounding
work and shall re-cut and replace any joints that are poorly formed or do not match the
mock-up or the surrounding work, as determined by the Engineer, at the Contractor's
own expense.
H. Moist cure all work, spraying with a water mist and cover with damp cloth or tarpaulin.
I. Chemically clean all surfaces following completion and curing of work.
J. Completed work shall match approved sample patch or shall be re -done at the
Contractor’s expense.
3.11 CLEANING AND PROTECTION OF COMPLETED MASONRY WORK
A. As work proceeds and upon completion, remove excess mortar, smears and droppings.
Clean adjacent and adjoining surface of marks arising out of execution of work in this
Section.
B. Sweep up and remove daily sand, cleaning compounds and mixtures, dirt, debris and
rubbish. Sweep or flush away nightly, all residual washed materials. Keep the premises
neat and clean at all times.
C. After installation and pointing are completed, carefully clean all surfaces of all dirt, excess
mortar, grout splatter, stains and/or other site incident defacements. Clean soiled
surfaces using a non-acidic solution that will not harm stone or adjacent materials.
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Consult stone fabricator for acceptable cleaners. Do not use wire brushes, acid or other
solutions which may cause discoloration. Use nonmetallic tools in cleaning operation.
Apply in accordance with cleaner manufacturer recommendations.
D. Mechanically remove all loose mortar and concrete splatter with hand tools without
scratching, gouging or otherwise marring the existing substrate.
E. Chemically clean stone following completion of work, and where specifically specified on
the drawings.
3.12 INSTALLATION OF FLEXIBLE SEALANTS
A. Provide backer rod and sealant where indicated on the Contract Drawings.
B. Install backer rod and sealant in strict accordance to manufacturer's instructions. Use
primer where recommended by manufacturer.
C. Size backer rod for each joint size.
D. Install sealant to the depth recommended by the manufacturer for each width of joint.
Joint profile shall match adjoining mortar profile. Face of joint shall be sanded so that
color and texture shall match adjoining mortar joints.
E. Sealant at backer rod shall be installed at all locations indicated on Drawings and at all
locations subject to structural or thermal movement.
END OF SECTION 04100
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SECTION 04720
UNIT CAST STONE
PART 1 - GENERAL
1.1 GENERAL REQUIREMENTS
A. Drawings and general provisions of the Contract, including General and
Supplementary Conditions and Division1 Specification Sections, apply to this Section.
1.2 WORK INCLUDED
A. The Work of this Section includes all labor, materials, equipment and services
necessary to complete the cast stone work as shown on the drawings and specified
herein, including but not necessarily limited to the following:
1. Cast stone units for replacement of existing damaged sandstone units.
1.3 RELATED WORK
A. Masonry Restoration - Section 04100.
1.4 QUALITY ASSURANCE
A. Manufacturer Qualifications: A firm with a minimum of five (5) years experience in
manufacturing cast stone units similar to those indicated for this Project and with a
record of successful in-service performance, as well as sufficient production capacity
to manufacture required units.
B. Source Limitations for Cast Stone: Obtain cast stone units through one source from a
single manufacturer.
C. Reference Standards: Comply with the following:
1. Cast Stone Institute Technical Manual, current edition.
2. ASTM C 150; Specification for Portland Cement.
3. ASTM C 615; Specification for deformed and plain billet steel bars for concrete
reinforcement.
4. ASTM C 979 - Standard Specification for Pigments for Integrally Colored
Concrete.
5. ASTM C 1194; Compressive strength, 6000 psi minimum for products at 28
days.
6. ASTM C 1195 or ASTM C 642: Absorption, 6% maximum for products at 28
days.
UNIT CAST STONE
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1.5 SUBMITTALS
A. Shop Drawings: Show fabrication and installation details for all cast stone units.
Include dimensions, details of anchorages and reinforcement, if any; and indication of
finished faces. Indicate type and location of reinforcement steel, wire cages and
anchors that are cast into the units.
1. The Contractor shall be responsible for fully documenting and measuring
existing designated stone units for replication in cast stone. The Contractor shall
also be responsible for working with the Engineer in order to detail the anchors
that tie the cast stone to the building.
2. The shop drawings shall show the setting mark of each unit of cast stone and its
location on the structure. The cast stone shall bear the same corresponding
setting mark on an unexposed surface.
3. Shop drawings shall show exact profiles for each cast stone unit.
4. Include building elevations showing layout of units and locations of joints and
anchors.
B. Samples:
1. Submit three 12" x 12" cast stone samples showing full range of colors and
textures proposed to match existing.
C. Material Test Reports: From a qualified testing agency indicating and interpreting test
results for compliance of cast stone with requirements indicated.
D. Qualification Data: For firms and persons specified in "Quality Assurance" Article to
demonstrate their capabilities and experience. Include lists of completed projects with
project names and addresses, names and addresses of Engineers and owners, and
other information specified.
1. Include copies of material test reports for completed projects, indicating
compliance of cast stone with ASTM C1364.
1.6 DELIVERY, STORAGE AND HANDLING
A. Pack, handle, and ship cast stone units in suitable packs or pallets.
1. Lift with wide-belt slings; do not use wire rope or ropes that might cause staining.
Move cast stone units, if required, using dollies with wood supports.
2. Store cast stone units on wood skids or pallets with non-staining, waterproof
covers. Arrange to distribute weight evenly and to prevent damage to units.
Ventilate under covers to prevent condensation.
B. Store installation materials on elevated platforms, u nder cover, and in a dry location.
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C. Protection:
1. Use all means necessary to protect cast stone and related materials before,
during and after installation and to protect the installed work and materials of all
other trades.
D. Replacements: In the event of damage, immediately make all repairs and
replacements necessary for Engineer’s approval, at no additional cost to the Owner.
1.7 COORDINATION
A. Coordinate production and delivery of cast stone with masonry restoration work to
minimize the need for on-site storage and to avoid delaying the Work.
PART 2 - PRODUCTS
2.1 CAST STONE COLOR AND FINISH
A. The Cast Stone used in this work shall match color, texture and variation of the
existing brown sandstone that is being replaced.
B. The samples shall be approved by the Engineer before the manufacturer shall be
required to proceed with the work.
C. Exposed surfaces, unless otherwise specified, shall exhibit a weathered appearance.
D. Models and Molds
1. Certain changes in profile, section and wash may be required in the
model/pattern phase in order to improve on the durability and water shedding
capability of the original units.
2. All models and patterns shall be prepared by skilled craftsmen in a correct and
artistic manner in strict accordance with the spirit and intent of the original units
and the contract drawings. Models shall be approved by Engineer before any
work is executed from them.
3. Provide forms and molds as required to produce finished surfac es. Accurately
construct forms that are mortar tight and of sufficient strength to provide cast
stone units of shape, lines and sizes shown.
4. Forms and molds shall be kept in good, re-usable condition for the duration of
the casting process and shall be turned over to the Owner for future re-use
following completion of the work.
2.2 CAST STONE MATERIALS
A. General: Comply with ASTM C1364 and the following:
1. Portland Cement: ASTM C150, Type I White Cement
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2. Fine aggregate shall be carefully graded and washed natural sands, or
manufactured granite, marble, quartz or limestone sands meeting ASTM C33,
except that gradation may vary to achieve desired finish and texture.
3. Coarse aggregate shall be carefully graded and washed natural gravel, or
crushed graded stone such as granite, marble quartz, limestone or other durable
stone meeting ASTM C33, except that gradation may vary to achieve desired
finish and texture that matches existing weathered cast stone.
4. Coloring: All colors added shall be inorganic (natural or synthetic) iron oxide
pigments meeting ASTM C979 excluding the use of a cement grade of carbon
black pigment, and shall be guaranteed by the manufacturer to be light fast and
lime proof. The amount of pigment shall not exceed ten (10) percent by weight
of the cement used.
5. Air-Entraining Admixture: ASTM C260, certified by the manufacturer to be
compatible with other admixtures used.
a. Add to mixes for units exposed to the exterior at manufacturer's
prescribed rate to result in an air content of 5 to 7 percent.
B. Reinforcement: Deformed stainless steel rods conforming to ASTM A276, Type 304.
Reinforcing rod sizes shall be as shown on approved shop drawings. The material
covering in all cases shall be at least twice the diameter of the bars. Stone shall be
fully reinforced to take all stresses including handling, temperature changes and
structural stresses.
C. Anchors/ Ties: Provide at least one stainless steel tie from the cast stone units to the
building structure for up to every 2 square feet of exposed face of cast stone unit.
Fabrications and Hardware shall conform to ASTM A276, Type 304 or 316.
2.3 CAST STONE UNITS
A. Cast stone units shall exactly match and replicate the units that they are replacing.
Measure and document existing units as needed to produce re-usable forms for
casting of each component. Match aggregate and paste color and make -up of existing
units to provide, color, texture and appearance of the original units in their un -
weathered form.
B. Provide cast stone units complying with ASTM C1364.
1. Provide units that are resistant to freezing and thawing as determined by
laboratory testing according to ASTM C666, procedure, as modified by ASTM
C1364.
C. All Cast Stone used in this work shall have a minimum compressive strength of six
thousand (6,000) lbs. per square inch and absorption of not greater than five (5)
percent when tested in accordance with ACI 704.
D. Absorption: 6 percent maximum at 28 days, per ASTM C 1195 or ASTM C 642.
E. Reinforce units as indicated and as required by ASTM C1364. Use stainless steel
reinforcement. Provide reinforcement of at least 0.25% of cross -sectional area in any
direction exceeding 12” in length.
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F. Fabricate units with sharp arris and details accurately reproduced with indicated
texture on all exposed surfaces, unless otherwise indicated.
1. Slope exposed horizontal surfaces at least 1:12, unless otherwise indicated.
2. Provide drips on projecting elements, unless otherwise indicated.
G. Casting Tolerances: Maintain casting, bowing, warping and dimension tolerance to
within the following:
1. Overall dimension for height, width and length of units: Plus zero of unit
dimension to minus 1/8” in each direction.
2. Bowing or warping: Not to exceed 1/360 of the span.
2.4 FABRICATION
A. Cast stone shall cured in a totally enclosed curing room or if weather permits; yard
cure.
B Yard cure units until the sum of the mean daily temperatures for each day equals or
exceeds 350 deg F.
C. Acid etch or lightly sandblast units to remove cement film from exposed surfaces to
achieve desired finish.
D. Cast stone shall have sharp arrises to match profiles on approved shop drawings.
Provide stone with sinkages to receive anchors.
PART 3 - EXECUTION
3.1 PREPARATION
A. CLEAN CAST STONE BEFORE SETTING BY THROUGHLY SCRUBBING WITH
FIBER BRUSHES FOLLOWED BY A THROUGH DRENCHING WITH CLEAR
WATER. USE ONLY MILD CLEANING COMPOUNDS THAT CONTAIN NO CAUSTIC
CHEMICALS.
3.2 INSTALLATION
A. Installation of cast stone is specified under Section 04100 – Masonry Restoration
END OF SECTION
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UNIT BROWNSTONE
04730 - 1
SECTION 04730
UNIT BROWNSTONE
PART 1 - GENERAL
1.1 GENERAL PROVISIONS
A. Attention is directed to the existing conditions at the site. The Contractor shall become
thoroughly familiar with the existing conditions in order to assess the scope of work
required.
1.2 WORK INCLUDED
A. This Section includes the following:
1. Provide all labor, materials, equipment, and services required to complete the work
as described on the drawings, as specified in this section, and as may be required.
2. Stone Fabrication: Fabricate new brownstone units to replace the failed brownstone
units.
1.3 RELATED SECTIONS
A. Section 04100 – Masonry Restoration
1.4 QUALITY ASSURANCE
A. Manufacturer Qualifications: A firm with a minimum of five (15) years experience in
manufacturing ornamental stone units similar to those indicated for this Project and with a
record of successful in-service performance, as well as sufficient production capacity to
manufacture required units.
1.5 REFERENCE STANDARDS
A. ASTM C119: Definitions of Terms Relating to Natural Building Stones
B. ASTM C144: Aggregate for Masonry Mortar
C. ASTM C150: Portland Cement
D. ASTM C170: Compressive Strength
E. ASTM C270: Mortar for Unit Masonry
1.6 SUBMITTALS
A. General: Submit the following according for review by the Engineer.
1. Shop Drawings:
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04730 - 2
a. Submit setting drawings showing the numbering system that will be used to
label elements. Indicate anchor locations, diameter of holes and length and
diameter of pins for all stone resetting.
b. Submit detailed shop drawings showing dimensions and profiles of
replacement stone units. Indicate anchor locations, diameter of holes and
length and diameter of pins to be used in setting.
c. Verify and take all necessary field measurements prior to fabrication.
d. Establish the jointing in accordance with industry standards if the Contract
Drawings do not show the intent of jointing.
e. Sizes, kinds and spacing of anchors and dowels shall be engineered by shop
drawing preparer for each type of anchoring system.
2. Do not fabricate or install any items until shop drawings have been approved.
B. Product data for each product indicated including recommendations for their application
and use. Include test reports and certifications substantiating that products comply with
requirements.
C. Qualification data for firms and persons specified in the "Quality Assurance" Article to
demonstrate their capabilities and experience. Include a list of completed projects with
project names, addresses, names of Engineers and Owners, and other information
specified.
1.7 DELIVERY, STORAGE AND HANDLING
A. Pack, handle, and ship Slate units in suitable packs or pallets.
1. Lift with wide-belt slings; do not use wire rope or ropes that might cause staining.
Move stone units, if required, using dollies with wood supports.
2. Store stone units on wood skids or pallets with non-staining, waterproof covers.
Arrange to distribute weight evenly and to prevent damage to units. Ventilate under
covers to prevent condensation.
B. Store installation materials on elevated platforms, under cover, and in a dry location.
C. Protection:
1. Use all means necessary to protect stone and related materials before, during and
after installation and to protect the installed work and materials of all other trades.
D. Replacements: In the event of damage, immediately make all repairs and replacements
necessary for Engineer’s approval, at no additional cost to the Owner.
1.8 COORDINATION
A. Coordinate production and delivery of brownstone with masonry restoration work to
minimize the need for on-site storage and to avoid delaying the Work.
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UNIT BROWNSTONE
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PART 2 - PRODUCTS
2.1 BROWNSTONE UNITS:
A. Replacement brownstone units shall exactly match the units that they are to replace but
in their original, as-fabricated conditions.
B. Exposed Finishes and Details: Sawcut or carved finishes to match the original.
C. Source Materials: Brownstone Units shall be cut and harvested from remaining sound
portoins of much larger brownstone units that are being replaced with cast stone. Re -
used material shall be cut from salvaged material that is at least 4” from any formerly
externally exposed face.
D. All units shall be naturally bedded in their orientations, with bedding planes running in the
horizotal direction.
2.2 UNIT FABRICATION
A. Cut all stone as required accurately to shape and dimensions and full to the square with
jointing as shown or required. Cut to curvature where required. All exposed faces shall be
dressed true. Beds and joints shall be at right angles to the face and joints shall have a
uniform thickness of 3/8 inch except as required to match existing conditions. All exposed
arrises shall be in true alignment and slightly eased to prevent snipping.
B. Provide all necessary holes, slots, recesses and sinkages for accessories in accordance
with industry standard practices. Provide cramp holes or Lewis pin holes for stones that can
not be handled manually. No holes for handling devices will be allowed in exposed
surfaces. Provide all cutting and drilling of stone to accommodate other trades.
1. Incidental Cutting and Drilling: Where thickness permits, all pieces weighing over 100
pounds may have Lewis holes for lifting if desired. Lewis holes may extend no closer
than 2" from the finished face, and will not be permitted on exposed surfaces except
with written permission of the Landscape Engineer. Pieces under 4" in thickness may
have holes for C-clamps if required, on surfaces not exposed.
C. Dimensional Tolerance
1. Thickness: the variation from nominal thickness as specified shall not exceed the
following:
a. Up to 2-1/2"+/- 1/8"
2. Face Dimensions: Maximum variation in the dimension of any piece shall be 1/4 of
the specified bed joint width, however, in any case not less than +/- 1/16".
D. Flatness Tolerances: Variation from true plane, or flat surfaces shall be determined by a 4
foot dimension in any direction on the surface. Such variations on polished, honed and fine
rubbed surfaces shall not exceed tolerances listed below or 1/3 of the specified joint width,
whichever is greater. On surfaces having other finishes, the maximum variation from true
plane shall not exceed the tolerance listed below or 1/2 of the specified joint width
whichever is greater.
1. Sawn, 4-cut, 6-cut and 8-cut finishes: 1/8"
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2. Thermal and coarse stippled finishes: 3/16"
E. Beds and Joints: Pieces shall be bedded and jointed as shown on the approved shop
drawings, and bed and joint surfaces shall be cut as follows:
1. Beds and joints shall be cut or sawn full square for the specified minimum thickness
of the piece. If the thickness is greater, the remainder shall fall under square not
more than 3" in 12".
2. Provide 3/8" joints unless otherwise shown on the Drawings.
3. Provide for beds as shown on the Drawings.
F. Backs of Pieces: Backs of pieces shall be sawn or roughly dressed to a pproximate true
planes. Sawn backs shall be cleaned of all rust stains and free from iron particles.
Wherever shown on approved shop drawings, pieces shall be backed off to clear structural
members or other obstructions.
G. Washes and Drips shall be constant in profile throughout their length, in strict conformity
with details shown on approved shop drawings.
H. Incidental Cutting and Drilling: Where thickness permits, all pieces weighing over 100
pounds may have Lewis holes for lifting if desired. Lewis holes may extend no closer than
2" from the finished face, and will not be permitted on exposed surfaces except with written
permission of the Engineer. Pieces under 4" in thickness may have holes for C-clamps if
required, on surfaces not exposed.
I. Anchor Tolerances
1. The centers of all back anchors cut into stone shall be within +/- 1/4" of the location
specified on the shop drawings. The dimensions of all back anchor sinkages shall be
as shown on the shop drawings within a tolerance of +/- 1/16". The thickness of slots
or kerfs cut into the edge of stone for anchorage purposes shall be within +/- 1/16" of
the dimension shown on the shop drawings. The location across the stone thickness
on the centers of slots or kerfs cut into the edge of stone shall be as stated on th e
shop drawings within a tolerance of +/- 1/16".
2. Depth of kerfs, rebated kerfs or anchor holes shall be as shown on the shop
drawings, but shall be allowed to vary in depth to a minimum required for anchorage
clearance and a maximum not to impact the structural integrity of the anchoring
system. In any case tolerances of -1/8" +3/8" will be allowed.
J. Shop clean brownstone at time of final fabrication.
PART 3 - EXECUTION
3.1 PREPARATION
A. Clean brownstone before setting by thoroughly scrubbing with fiber brushes followed by a
through drenching with clear water. Use only mild cleaning compounds that contain no
caustic chemicals.
3.2 INSTALLATION
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A. Installation of Unit Brownstone is specified under Section 04100 – Masonry Restoration.
END OF SECTION 04730
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Rough Carpentry and Timber
06050 - 1/3
SECTION 06050
ROUGH CARPENTRY AND TIMBER
PART 1 - GENERAL
1.1 INCLUDED IN THIS SECTION
A. Framing repairs and reinforcement to roof structure.
1.2 RELATED SECTIONS
A. Section 02210 - Temporary Shoring and Bracing.
1.3 REFERENCES
A. ALSC (American Lumber Standards Committee) - Softwood Lumber Standards.
B. ASTM (American Society of Testing and Materials) D245 - Standard Practice for
Establishing Structural Grades and Related Allowable Properties for Visually Graded
Lumber.
C. AWPA (American Wood Preservers Association) C1 - All Timber Products - Preservative
Treatment by Pressure Process.
D. MWPA (Massachusetts Wood Producers Association) - Grading Rules.
E. MSBBRS (Massachusetts State Board of Building Regulations and Standards) - Grading
Agency Certification.
F. NELMA (Northeast Lumber Manufacturer's Association) - Grading Rules.
G. NFPA (National Forest Products Association).
H. NLGA (National Lumber Grades Authority).
I. NSLB (Northern Softwood Lumber Bureau) - Grading Rules.
J. SPIB (Southern Pine Inspection Bureau).
K. WCLIB (West Coast Lumber Inspection Bureau).
L. WWPA (Western Wood Products Association).
M. Timber Framer's Guild of North America - Recommended Standard Practice.
1.4 SUBMITTALS
A. Submit the following items to the Engineer for review:
1. Product Data sheets for standard hangers and supports.
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06050 - 2/3
2. Grading certification for remanufactured and new timber products.
1.5 QUALITY CONTROL
A. Comply with all referenced standards for the products employed.
B. Coordinate times of Engineer’s Special Inspections and keep Engineer abreast of progress
of work.
C. All work shall be performed by Timber Framers who can demonstrate at least five years of
experience performing this type of work in responsible charge.
PART 2 - PRODUCTS
2.1 DIMENSIONAL SAWN LUMBER
A. All sawn lumber shall be SPF No. 1 or No. 2.
B. Wooden shims shall be red or white oak.
2.2 MANUFACTURED LUMBER
A. Manufactured lumber shall be Microllam LVL as supplied by TrusJoist Macmillan or
equivalent.
2.3 MISCELLANEOUS FASTENERS AND CONNECTORS
A. Provide standard attachment hardware consisting of nails, bolts, screws and standard
fittings as noted on the drawings and as required. Hardware for rough carpentry shall be
as follows:
1. Bolts and Nuts: AISI / ASME Standard B18.2.1
2. Lag Screws: AISI / ASME Standard B18.6.1
3. Steel Washer Plates: Same as above or ASTM A36 for custom sizes.
4. Spikes: Galvanized, hardened steel conforming to Federal Specification FF-N-105B.
5. Standard Connectors (where specified or allowed): Items as manufactured by the
Simpson Strong-Tie Company of San Leandro, CA, or approved equal.
PART 3 - EXECUTION
3.1 INSTALLATION OF FRAMING
A. Set structural members in correct positions.
B. Make provisions for sufficient temporary bracing to maintain structure safe, plumb, and in
true alignment until completion of erection and installation of permanent bracing.
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Rough Carpentry and Timber
06050 - 3/3
C. Place horizontal members, crown side up.
D. Field drill all holes and recesses for bolts, lag screws and shear plates. Inject all bolt and
lead holes with wood preservative before installing hardware.
E. Holes for through bolts and lag screw shanks shall be 1/32” greater in diameter than bolt
and screw shanks.
F. Provide tapered oak shims of at least 1/8” thickness as required for adjustment and to
provide solid, firm contact between bearing surfaces where proper fit is not other wise
provided with existing members. Maximum allowable tolerance to be accommodated by
shims shall be 3/8" or less.
G. Make all cut lines plumb and true, to within 1/8" of required dimension. Do not leave any
splintered wood or checked end grain exposed to weather or soil.
END OF SECTION
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SHEATHING 06160 - 1 of 3
SECTION 06160
SHEATHING
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 1 Specification Sections, apply to this Section.
1.2
SUMMARY
A. This Section includes the following:
1. Wood roof decking.
1.3 UNIT PRICES
A. Work of this Section is affected by unit prices specified in Division 1 Section "Unit Prices."
1. Unit prices apply to additions to and deletions from Work as authorized by Change
Orders.
1.4 SUBMITTALS
A. Product Data: For each type of process and factory-fabricated product. Indicate component
materials and dimensions and include construction and application details.
1.5 DELIVERY, STORAGE, AND HANDLING
A. Stack plywood and other panels flat with spacers between each bundle to provide air
circulation. Provide for air circulation around stacks and under coverings.
PART 2 - PRODUCTS
2.1 SOLID-SAWN WOOD ROOF DECKING
A. Standard for Solid-Sawn Wood Roof Decking: Comply with AITC 112.
B. Roof Decking Species: Douglas fir-larch, Douglas fir-larch (North), or hem-fir, hem-fir (North).
C. Roof Decking Nominal Size: As required to match existing.
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SHEATHING 06160 - 2 of 3
D. Roof Decking Grade: Select Decking.
E. Grade Stamps: Factory mark each item with grade stamp of grading agency. Apply grade stamp
to surfaces that are not exposed to view.
F. Moisture Content: Provide wood roof decking with 19 percent maximum moisture content at
time of dressing.
G. Face Surface: Smooth.
2.2 FASTENERS
A. General: Provide fasteners of size and type indicated that comply with requirements specified
in this Article for material and manufacture.
1. Fasteners for Solid-Sawn Roof Decking: Provide fastener size and type complying with
AITC 112 for thickness of deck used.
B. Nails: Common; complying with ASTM F1667, Type I, Style 10.
C. Power-Driven Fasteners: NES NER-272.
D. Wood Screws: ASME B18.6.1.
PART 3 - EXECUTION
3.1 INSTALLATION, GENERAL
A. Do not use materials with defects that impair quality of sheathing or pieces that are too small to
use with minimum number of joints or optimum joint arrangement.
B. Cut panels at penetrations, edges, and other obs tructions of work; fit tightly against abutting
construction, unless otherwise indicated.
C. Securely attach to substrate by fastening as indicated, complying with the following:
1. NES NER-272 for power-driven fasteners.
2. Table 2305.2, "Fastening Schedule," in the Massachusetts State Building Code.
D. Fasten with screws in accordance with manufacturer’s recommendations.
E. Coordinate roof sheathing installation with flashing and joint-sealant installation so these
materials are installed in sequence and manner that prevent exterior moisture from passing
through completed assembly.
F. Do not bridge building expansion joints; cu t and space edges of panels to match spacing of
structural support elements.
G. Coordinate sheathing installation with installation of materials installed over sheathing so
sheathing is not exposed to precipitation or left exposed at end of the workday when rain is
forecast.
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SHEATHING 06160 - 3 of 3
3.2 WOOD ROOF PLANK INSTALLATION
A. Install solid-sawn wood roof decking to comply with AITC 112.
1. Locate end joints for lay-up to match existing.
END OF SECTION
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SLATE SHINGLES 07315 - 1 of 8
SECTION 07315
SLATE SHINGLES
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 1 Specification Sections, apply to this Section.
1.2
SUMMARY
A. Section Includes:
1. Slate shingles, including repairs to existing slate shingle roofing.
2. Underlayment.
3. Ridge accessories.
4. Metal flashing and trim.
5. All hoisting and scaffolding necessary for the completion of the roof work.
6. Waste disposal.
B. Related Sections:
1. Section 01351 "Historic Treatment Procedures" for general historic treatment
requirements.
2. Section 07620 “Sheet Metal Flashing and Trim.”
1.3 UNIT PRICES
A. Work of this Section is affected by unit prices specified in Division 1 Section "Unit Prices."
1. Unit prices apply to additions to and deletions from Work as authorized by Change
Orders.
1.4 DEFINITIONS
A. Roofing Terminology: See ASTM D 1079 and glossary in NRCA's "The NRCA Roofing and
Waterproofing Manual" for definitions of terms related to roofing work in this Section.
1.5
PREINSTALLATION MEETINGS
A. Preinstallation Conference: Conduct conference at Project site.
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SLATE SHINGLES 07315 - 2 of 8
1.6 ACTION SUBMITTALS
A. Product Data: For the following:
1. Slate shingles.
2. Underlayment materials.
3. Ridge accessories.
B. Samples: For each exposed product and for each color and texture specified, in sizes indicated.
1. Slate Shingles: Full size, of each color, size, texture, and shape.
2. Metal Ridge Cap: 12-inch- long Sample.
3. Rigid-Plastic Ridge Vent: 12-inch- long Sample.
4. Metal Valley Flashing: 12 inches square.
5. Fasteners: Three fasteners of each type, length, and finish.
1.7 INFORMATIONAL SUBMITTALS
A. Material Test Reports: Based on evaluation of comprehensive tests performed by a qualified
testing agency, for each slate variety.
B. Warranty: Sample of special warranty.
1.8
MAINTENANCE MATERIAL SUBMITTALS
A. Furnish extra materials that match products installed and that are packaged with protective
covering for storage and identified with labels describing contents.
1. Slate Shingles: 100 sq. ft. of each type and color, in unbroken bundles.
1.9 QUALITY ASSURANCE
A. Source Limitations: Obtain slate shingles from single quarry capable of producing slate of
consistent quality in appearance and physical properties.
B. Installer Qualifications: All work shall be performed by mechanics experienced in the h andling
and setting of the material having not less than ten years of satisfactory experience in
comparable installation of slate roofing including work on at least five projects similar in scope
and scale to this Project.
1. Submit references with name of contact person and telephone number for the three
submitted similar projects.
C. Mockups: Build mockups to verify selections made under sample submittals and to
demonstrate aesthetic effects and set quality standards for materials and execution.
1. Build mockups for slate shingles including related roofing materials.
a. Size: 48 inches long by 48 inches wide.
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SLATE SHINGLES 07315 - 3 of 8
2. Approval of mockups does not constitute approval of deviations from the Contract
Documents contained in mockups unless Architect specifically approves such deviations
in writing.
3. Approved mockups may become part of the completed Work if undisturbed at time of
Substantial Completion.
D. Preinstallation Conference: Conduct conference at Project site.
1.10 DELIVERY, STORAGE, AND HANDLING
A. Store underlayment rolls on end, on pallets or other raised surfaces. Do not double stack rolls.
1. Handle, store, and place roofing materials in a manner to avoid significant or permanent
damage to roof deck or structural supporting members.
B. Protect unused underlayment from weather, sunlight, and moisture when left overnight or when
roofing work is not in progress.
1.11 PROJECT CONDITIONS
A. Environmental Limitations: Proceed with installation of self-adhering sheet underlayment only
within the range of ambient and substrate temperatures recommended by manufacturer.
1.12 WARRANTY
A. Special Warranty: Standard form in which roofing Installer agrees to repair or replace slate
roofing that fails in materials or workmanship within specified warranty period.
1. Warranty Period: Two years from date of Substantial Completion.
PART 2 - PRODUCTS
2.1 SLATE SHINGLES
A. Slate Shingles: ASTM C 406, Grade S1; hard, dense, and sound; chamfered edges, with nail
holes machine punched or drilled and countersunk. No broken or cracked slates, no broken
exposed corners, and no broken corners on covered ends that could sacrifice na iling strength or
laying of a watertight roof.
1. Manufacturers: Subject to compliance with requirements, provide products by one of the
following, or equal:
a. Monson Maine Slate Co.
b. North Country Slate.
c. The Vintage Slate Company.
2. Thickness: Nominal 1/4 to 3/8 inch, to match existing.
3. Surface Texture: To match existing.
4. Size: 10 x 20 inches, 8-1/2 inch exposure, to match existing.
5. Nail Holes: Two per shingle.
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6. Butt Shape: Standard square cut.
7. Color: To match existing.
B. Starter Slate: Slate shingles with chamfered nail holes front-side punched.
1. Length: Exposure of slate shingle plus head lap.
2.2 UNDERLAYMENT MATERIALS
A. Asphalt-Saturated Organic Felt: ASTM D226/D226M Type II or ASTM D4869/D4869M Type IV,
unperforated.
B. Self-Adhering Sheet Underlayment, Polyethylene Faced: ASTM D 1970, minimum of 40 -mil-
thick, slip-resisting, polyethylene-film-reinforced top surface laminated to SBS-modified asphalt
adhesive, with release paper backing; cold applied.
1. Products: Subject to compliance with requirements, provide one of the following:
a. CertainTeed; WinterGuard HT.
b. GCP Applied Technologies; Grace Ice and Water Shield.
c. Johns Manville International, Inc.; Roof Defender.
d. Owens Corning; WeatherLock M.
2.3 RIDGE ACCESSORIES
A. Metal Ridge Cap: Metal covers with noncorrosive components complete with internal anchoring
lag screws, compression plates, and snap-on caps, fabricated for slate roof system indicated.
1. Type: Exposed-metal legs.
2. Metal Components: Copper, 20-oz./sq. ft.- thick sheet.
3. Accessories:
a. Splices, end caps, and other accessories of matching metal and finish.
2.4 ACCESSORIES
A. Butyl Sealant: ASTM C 1311, single-component, solvent-release butyl rubber sealant;
polyisobutylene plasticized; heavy bodied.
B. Elastomeric Sealant: ASTM C 920, elastomeric polyurethane polymer sealant; of type, grade,
class, and use classifications required to seal joints in slate-shingle roofing and remain
watertight.
C. Slating Nails: ASTM F 1667, copper or stainless -steel, smooth shanked, wire nails; 0.135-inch
minimum thickness; sharp pointed; with 3/8-inch- minimum diameter flat head; of sufficient
length to penetrate a minimum of 3/4 inch into sheathing.
1. Where nails are in contact with metal flashing, use nails made from same metal as
flashing.
D. Copper Slate Hooks: For slate repairs in lieu of nail and bib method.
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E. Underlayment Nails: Aluminum, stainless-steel, or hot-dip galvanized-steel wire nails with low-
profile capped heads or disc caps, 1-inch minimum diameter.
2.5 METAL FLASHING AND TRIM
A. Comply with requirements in Section 076200 "Sheet Metal Flashing and Trim."
B. Fabricate sheet metal flashing and trim to comply with recommendations that apply to design,
dimensions, metal, and other characteristics of the item in SMACNA's "Architectural Sheet
Metal Manual."
1. Sheet Metal: Copper, 20 oz.
2. Step Flashings: Fabricate with a head lap of 3 inches and a minimum extension of 4
inches both horizontally and vertically.
3. Open-Valley Flashings: Fabricate from metal sheet not less than 18 inches wide in
lengths not exceeding 10 feet, with 1-inch- high, inverted-V profile water diverter at center
of valley and equal flange widths of not less than 8 inches.
a. Hem flange edges for fastening with metal cleats.
4. Drip Edges: Fabricate in lengths not exceeding 10 feet with 2-inch roof-deck flange and
1-1/2-inch fascia flange with 3/8-inch drip at lower edge.
C. Vent-Pipe Flashings: ASTM B 749, Type L51121, at least 1/16 inch thick. Provide lead sleeve
sized to slip over and turn down into pipe, soldered to skirt at slope of roof and extending at
least 4 inches from pipe onto roof.
PART 3 - EXECUTION
3.1 EXAMINATION
A. Examine substrates, areas, and conditions, with Installer present, for compliance with
requirements for installation tolerances and other conditions affecting performance of the Work.
1. Examine roof sheathing to verify that sheathing joints are supported by framing and
blocking or metal clips and that installation is within flatness tolerances.
2. Verify that substrate is sound, dry, smooth, clean, sloped for drainage, and completely
anchored and that provision has been made for flashings and penetrations through
roofing.
B. Prepare written report, endorsed by Installer, listing conditions detrimental to performance of the
Work.
C. Proceed with installation only after unsatisfactory conditions have been corrected.
3.2 INSTALLATION OF UNDERLAYMENT MATERIALS
A. Comply with slate-shingle and underlayment manufacturers' written installation instructions and
with recommendations in NRCA's "The NRCA Roofing Manual: Steep-Slope Roof Systems"
applicable to products and applications indicated unless more stringent requirements are
specified in this Section or indicated on Drawings.
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B. Asphalt-Saturated Organic Felt: Install on roof deck parallel with and starting at eaves and
fasten with underlayment nails.
1. Single-Layer Installation:
a. Lap sides a minimum of 4 inches over underlying course.
b. Lap ends a minimum of 4 inches.
c. Stagger end laps between succeeding courses at least 72 inches.
2. Install fasteners in a grid pattern of 12 inches between side laps with 6-inch spacing at
side and end laps.
3. Install felt over areas protected by self-adhering, polymer-modified bitumen sheet.
4. Terminate felt flush against sidewalls, curbs, chimneys, and other roof projections.
C. Self-Adhering Sheet Underlayment: Install, wrinkle free, on roof deck. Comply with low-
temperature installation restrictions of underlayment manufacturer if applicable. Install at
locations indicated on Drawings, lapped in direction to shed water. Lap sides not less than 3 -
1/2 inches. Lap ends not less than 6 inches, staggered 24 inches between courses. Roll laps
with roller. Cover underlayment within seven days.
1. Prime masonry surfaces to receive self-adhering sheet underlayment.
2. Eaves: Extend from edges of eaves 36 inches beyond interior face of exterior wall.
3. Rakes: Extend from edges of rakes 36 inches beyond interior face of exterior wall.
4. Valleys: Extend from lowest to highest point 18 inches on each side.
5. Hips: Extend 18 inches on each side.
6. Ridges: Extend 36 inches on each side.
7. Sidewalls: Extend 18 inches beyond sidewalls and return vertically against sidewalls not
less than 4 inches.
8. Dormers, Chimneys, Skylights, and Other Roof-Penetrating Elements: Extend 18 inches
beyond penetrating elements and return vertically against penet rating elements not less
than 4 inches.
9. Roof-Slope Transitions: Extend 18 inches on each roof slope.
3.3 METAL FLASHING INSTALLATION
A. General: Install metal flashings according to recommendations in NRCA's "The NRCA Roofing
and Waterproofing Manual."
B. Apron Flashings: Extend lower flange over and beyond each side of downslope slate shingles
and up the vertical surface.
C. Step Flashings: Install with a head lap of 3 inches and extend both horizontally and vertically.
Install with lower edge of flashing just upslope of, and concealed by, butt of overlying slate
shingle. Fasten to roof deck only.
D. Open-Valley Flashings: Install centered in valleys, lapping ends at least 8 inches in direction
that sheds water.
1. Fasten upper end of each length to roof deck beneath overlap.
2. Secure hemmed flange edges into metal cleats spaced 12 inches apart and fastene d to
roof deck.
3. Adhere minimum 9-inch- wide strips of self-adhering, polymer-modified bitumen sheet to
metal flanges and to underlying self-adhering, polymer-modified bitumen sheet. Place
strips parallel to and over flanges so that they will be just concealed by installed shingles.
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4. Provide a closure at the end of the inverted-V profile of the valley metal to minimize water
and ice infiltration.
E. Rake Drip Edges: Install over underlayment and fasten to roof deck.
F. Eave Drip Edges: Install beneath underlayment and fasten to roof deck.
G. Pipe Flashings: Form flashing around pipe penetrations and slate shingles. Fasten and seal to
slate shingles.
3.4 SLATE-SHINGLE INSTALLATION
A. General: Beginning at eaves, install slate shingles according to manufacturer's written
instructions and to details and recommendations in NRCA's "The NRCA Roofing and
Waterproofing Manual."
1. Install wood nailer strip cant at eave edges.
2. Install shingle starter course chamfered face down.
B. Replace existing damaged slate shingles in field using copper slate hook repair method.
C. Install first and succeeding shingle courses with chamfered face up. Install full -width first course
at rake edge.
1. Offset joints of uniform-width slate shingles by half the shingle width in succeeding
courses.
2. Offset joints of random-width slate shingles a minimum of 3 inches in succeeding
courses.
D. Maintain a 4-inch- minimum head lap between succeeding shingle courses.
E. Maintain uniform exposure of shingle courses between eaves and ridge.
F. Extend shingle starter course and first course 1 inch over fasciae at eaves.
G. Extend shingle starter course and succeeding courses 1 inch over fasciae at rakes.
H. Cut and fit slate neatly around roof vents, pipes, ventilators, and other projections through roof.
I. Hang slate with two slating nails for each shingle with nail heads lightly touching slate. Do not
drive nails home drawing slates downward or leave nail head protruding enough to interfere with
overlapping shingle above.
J. Open Valleys: Cut slate shingles to form straight lines at open valleys, trimming upper
concealed corners of shingles. Widen exposed portion of open valley 1/8 inch in 12 inches from
highest to lowest point, or in width to match existing valley flashing.
1. Do not nail shingles to valley metal flashings.
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3.5 INSTALLATION OF RIDGE ACCESSORIES
A. Metal Ridge Caps: Install units in accordance with manufacturer's written instructions.
1. Install slate shingles into retention channels, butting adjacent shingles.
3.6 ADJUSTING AND CLEANING
A. Remove and replace damaged or broken slate shingles.
B. Remove excess slate and debris from Project site.
END OF SECTION
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SHEET METAL FLASHING AND TRIM 07620 - 1 of 8
SECTION 07620
SHEET METAL FLASHING AND TRIM
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 1 Specification Sections, apply to this Section.
1.2 SUMMARY
A. Section Includes:
1. Formed Products:
a. Formed counterflashing.
b. Formed steep-slope roof sheet metal fabrications.
c. Formed low-slope roof sheet metal fabrications.
d. Roof penetration flashing.
e. Flat seam metal roofing.
2. All hoisting and scaffolding necessary for the completion of the work.
3. Waste disposal.
B. Related Sections:
1. Section 01351 "Historic Treatment Procedures" for general historic treatment
requirements.
2. Section 07315 “Slate Shingles.”
1.3 PERFORMANCE REQUIREMENTS
A. General: Sheet metal flashing and trim assemblies as indicated shall withstand wind loads,
structural movement, thermally induced movement, and exposure to weather without failure due
to defective manufacture, fabrication, installation, or other defects in construction. Completed
sheet metal flashing and trim shall not rattle, leak, or loosen, and shall remai n watertight.
B. Thermal Movements: Provide sheet metal flashing and trim that allows for thermal movements
from ambient and surface temperature changes.
1. Temperature Change (Range): 120 deg F, ambient; 180 deg F, material surfaces.
1.4 SUBMITTALS
A. Product Data: For each type of product indicated. Include construction details, material
descriptions, dimensions of individual components and profiles, and finishes for each
manufactured product and accessory.
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B. Shop Drawings: Show fabrication and installation layouts of sheet metal flashing and trim,
including plans, elevations, expansion-joint locations, and keyed details. Distinguish between
shop- and field-assembled work. Include the following:
1. Identification of material, thickness, weight, and finish for each item and location in
Project.
2. Details for forming sheet metal roofing, including seams and dimensions.
3. Details for forming sheet metal flashing and trim, including profiles, shapes, seams, and
dimensions.
4. Details for joining, supporting, and securing sheet metal flashing and trim, including
layout of fasteners, cleats, clips, and other attachments. Include pattern of seams.
5. Details of termination points and assemblies, including fixed points.
6. Details of expansion joints and expansion-joint covers, including showing direction of
expansion and contraction.
7. Details of edge conditions, including eaves, ridges, valleys, rakes, crickets, and
counterflashings as applicable.
8. Details of special conditions.
9. Details of connections to adjoining work.
10. Detail formed flashing and trim at a scale of not less than 1-1/2 inches per 12 inches.
C. Samples for Initial Selection: For each type of sheet metal flashing, trim, and accessory
indicated with factory-applied color finishes involving color selection.
D. Samples for Verification: For each type of exposed finish required, prepared on Samples of
size indicated below:
1. Sheet Metal Roofing: 12 inches long by actual width of unit, including finished seam and
in required profile. Include fasteners and other attachments.
2. Sheet Metal Flashing: 12 inches long by actual width of unit, including finished seam and
in required profile. Include fasteners, cleats, clips, closures, and other attachments.
3. Trim, Metal Closures, Expansion Joints, Joint Intersections, and Mis cellaneous
Fabrications: 12 inches long and in required profile. Include fasteners and other
exposed accessories.
4. Accessories and Miscellaneous Materials: Full-size Sample.
E. Qualification Data: For qualified fabricator.
F. Maintenance Data: For sheet metal flashing, trim, and accessories to include in maintenance
manuals.
1.5 QUALITY ASSURANCE
A. Product Options: Information on Drawings and in Specifications establishes requirements for
system's aesthetic effects and performance characteristics. Aesthetic effects are indicated by
dimensions, arrangements, alignment, and profiles of components and assemblies as they
relate to sightlines, to one another, and to adjoining construction. Performance characteristics
are indicated by criteria subject to verification by one or more methods including preconstruction
testing, field testing, and in-service performance.
1. Do not modify intended aesthetic effects, as judged solely by Architect, except with
Architect's approval. If modifications are proposed, submit comprehensive explanatory
data to Architect for review.
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B. Fabricator Qualifications: Shop that employs skilled workers who custom fabricate sheet metal
flashing and trim similar to that required for this Project and whose products have a record of
successful in-service performance.
C. Sheet Metal Flashing and Trim Standard: Comply with SMACNA's "Architectural Sheet Metal
Manual" unless more stringent requirements are specified or shown on Drawings.
D. Copper Roofing Standard: Comply with CDA's "Copper in Architecture Handbook." Conform to
dimensions and profiles shown unless more stringent requirements are indicated.
E. Preinstallation Conference: Conduct conference at Project site.
1. Meet with Owner, Architect, Project Manager, Owner's insurer if applicable, Installer, and
installers whose work interfaces with or affects sheet metal flashing and trim including
installers of roofing materials, roof accessories, unit skylights, and roof-mounted
equipment.
2. Review methods and procedures related to sheet metal flashing and trim.
3. Examine substrate conditions for compliance with requirements, including flatness and
attachment to structural members.
4. Review special roof details, roof drainage, roof penetrations, and condition of other
construction that will affect sheet metal flashing.
5. Document proceedings, including corrective measures and actions required, and furnish
copy of record to each participant.
1.6 DELIVERY, STORAGE, AND HANDLING
A. Do not store sheet metal flashing and trim materials in contact with other materials that might
cause staining, denting, or other surface damage. Store sheet metal flashing and trim materials
away from uncured concrete and masonry.
B. Protect strippable protective covering on sheet metal flashing and trim from exposure to sunlight
and high humidity, except to the extent necessary for the period of sheet metal flashing and trim
installation.
1.7 COORDINATION
A. Coordinate installation of manufactured roof specialties with interfacing and adjoining
construction to provide a leakproof, secure, and noncorrosive installation.
PART 2 - PRODUCTS
2.1 SHEET METALS
A. General: Protect mechanical and other finishes on exposed surfaces from damage by applying
a strippable, temporary protective film before shipping.
B. Copper Sheet: ASTM B 370, cold-rolled copper sheet, H00 or H01 temper, 20 oz./sq. ft. unless
otherwise indicated.
1. Nonpatinated Exposed Finish: Mill.
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2.2 MISCELLANEOUS MATERIALS
A. General: Provide materials and types of fasteners, solder, welding rods, protective coatings,
separators, sealants, and other miscellaneous items as required for complete sheet metal
flashing and trim installation and recommended by manufacturer of primary sheet metal or
manufactured item unless otherwise indicated.
B. Fasteners: Wood screws, annular threaded nails, self-tapping screws, self-locking rivets and
bolts, and other suitable fasteners designed to withstand design loads and recommended by
manufacturer of primary sheet metal or manufactured item.
1. General: Blind fasteners or self-drilling screws, gasketed, with hex-washer head.
a. Exposed Fasteners: Heads matching color of sheet metal using plastic caps or
factory-applied coating.
b. Blind Fasteners: High-strength aluminum or stainless-steel rivets suitable for
metal being fastened.
2. Fasteners for Copper Sheet: Copper, hardware bronze or passivated Series 300
stainless steel.
C. Solder:
1. For Copper: Zinc alloy copper, ASTM B 32, Grade Sn95, 95 percent tin, 5 percent
antimony.
a. Basis of Design Product: Subject to compliance with requirements, provide the
following or equal:
1) Johnson Manufacturing Co.; #497 SuperFlo with E-127 Flux-‘N-Solder with
Pure Tin soldering flux.
D. Sealant Tape: Pressure-sensitive, 100 percent solids, gray polyisobutylene compound sealant
tape with release-paper backing. Provide permanently elastic, nonsag, nontoxic, nonstaining
tape 1/2 inch (13 mm) wide and 1/8 inch (3 mm) thick.
E. Elastomeric Sealant: ASTM C 920, elastomeric polyurethane polymer sealant; low modulus; of
type, grade, class, and use classifications required to seal joints in sheet metal flashing and trim
and remain watertight.
F. Butyl Sealant: ASTM C 1311, single-component, solvent-release butyl rubber sealant;
polyisobutylene plasticized; heavy bodied for hooked -type expansion joints with limited
movement.
G. Epoxy Seam Sealer: Two-part, noncorrosive, aluminum seam-cementing compound,
recommended by aluminum manufacturer for exterior non moving joints, including riveted joints.
2.3 FABRICATION, GENERAL
A. General: Custom fabricate sheet metal flashing and trim to comply with recommendations in
SMACNA's "Architectural Sheet Metal Manual" that apply to design, dimensions, geometry,
metal thickness, and other characteristics of item indicated. Fabricate items at the shop to
greatest extent possible.
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SHEET METAL FLASHING AND TRIM 07620 - 5 of 8
1. Flat-Seam Roofing: Form flat-seam panels from metal sheets 16 x 36 inches with 3/4 -
inch notched and folded edges.
2. Fabricate sheet metal flashing and trim in thickness or weight needed to comply with
performance requirements, but not less than that specifi ed for each application and
metal.
3. Obtain field measurements for accurate fit before shop fabrication.
4. Form sheet metal flashing and trim without excessive oil canning, buckling, and tool
marks and true to line and levels indicated, with exposed edges fold ed back to form
hems.
5. Conceal fasteners and expansion provisions where possible. Exposed fasteners are not
allowed on faces exposed to view.
B. Fabrication Tolerances: Fabricate sheet metal flashing and trim that is capable of installation to
a tolerance of 1/4 inch in 20 feet on slope and location lines as indicated and within 1/8 -inch
offset of adjoining faces and of alignment of matching profiles.
C. Sealed Joints: Form nonexpansion but movable joints in metal to accommodate elastomeric
sealant.
D. Expansion Provisions: Where lapped expansion provisions cannot be used, form expansion
joints of intermeshing hooked flanges, not less than 1 inch deep, filled with butyl sealant
concealed within joints.
E. Fabricate cleats and attachment devices from same material as accessory being anchored or
from compatible, noncorrosive metal.
F. Fabricate cleats and attachment devices of sizes as recommended by SMACNA's "Architectural
Sheet Metal Manual" for application, but not less than thickness of metal being secured.
G. Seams: Fabricate nonmoving seams with flat-lock seams. Tin edges to be seamed, form
seams, and solder.
H. Do not use graphite pencils to mark metal surfaces.
2.4 STEEP-SLOPE ROOF SHEET METAL FABRICATIONS
A. Step Flashing: Fabricate from the following material:
1. Copper: 20 oz./sq. ft.
B. Valley Flashing: Fabricate from the following material:
1. Copper: 20 oz./sq. ft.
C. Drip Edges: Fabricate from the following material:
1. Copper: 20 oz./sq. ft.
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SHEET METAL FLASHING AND TRIM 07620 - 6 of 8
PART 3 - EXECUTION
3.1 EXAMINATION
A. Examine substrates, areas, and conditions, with Installer present, to verify actual locations,
dimensions and other conditions affecting performance of the Work.
1. Verify compliance with requirements for installation tolerances of substrates.
2. Verify that substrate is sound, dry, smooth, clean, sloped for drainage, and securely
anchored.
B. For the record, prepare written report, endorsed by Installer, listing conditions detrimental to
performance of the Work.
C. Proceed with installation only after unsatisfactory conditions have been corrected.
3.2 INSTALLATION, GENERAL
A. General: Anchor sheet metal flashing and trim and other components of the Work securely in
place, with provisions for thermal and structural movement. Use fasteners, solder, welding
rods, protective coatings, separators, sealants, and other miscellaneous items as required to
complete sheet metal flashing and trim system.
1. Install sheet metal flashing and trim true to line and levels indicated. Provi de uniform,
neat seams with minimum exposure of solder, welds, and sealant.
2. Install sheet metal flashing and trim to fit substrates and to result in watertight
performance. Verify shapes and dimensions of surfaces to be covered before fabricating
sheet metal.
3. Space cleats not more than 12 inches apart. Anchor each cleat with two fasteners. Bend
tabs over fasteners.
4. Install exposed sheet metal flashing and trim without excessive oil canning, buckling, and
tool marks.
5. Install sealant tape where indicated.
6. Torch cutting of sheet metal flashing and trim is not permitted.
7. Do not use graphite pencils to mark metal surfaces.
B. Metal Protection: Where dissimilar metals will contact each other or corrosive substrates,
protect against galvanic action by painting contact surfaces with bituminous coating or by other
permanent separation as recommended by SMACNA.
1. Underlayment: Where installing metal flashing directly on cementitious or wood
substrates, install a course of felt underlayment and cover with a slip sheet or install a
course of polyethylene sheet.
C. Expansion Provisions: Provide for thermal expansion of exposed flashing and trim. Space
movement joints at a maximum of 10 feet with no joints allowed within 24 inches of corner or
intersection. Where lapped expansion provisions cannot be used or would not be sufficiently
watertight, form expansion joints of intermeshing hooked flanges, not less than 1 inch (25 mm)
deep, filled with sealant concealed within joints.
D. Fastener Sizes: Use fasteners of sizes that will penetrate wood sheathing not less than 1-1/4
inches for nails and not less than 3/4 inch for wood screws.
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E. Seal joints as shown and as required for watertight construction.
1. Where sealant-filled joints are used, embed hooked flanges of joint members not less
than 1 inch into sealant. Form joints to completely conceal sealant. When ambient
temperature at time of installation is moderate, between 40 and 70 deg F, set joint
members for 50 percent movement each way. Adjust setting proportionately for
installation at higher ambient temperatures. Do not install sealant-type joints at
temperatures below 40 deg F.
2. Prepare joints and apply sealants to comply with requirements in Section 07 92 00 "Joint
Sealants."
F. Soldered Joints: Clean surfaces to be soldered, removing oils and foreign matter. Pre-tin
edges of sheets to be soldered to a width of 1-1/2 inches, except reduce pre-tinning where pre-
tinned surface would show in completed Work.
1. Do not solder aluminum sheet.
2. Pre-tinning is not required for zinc-tin alloy-coated copper.
3. Do not use torches for soldering. Heat surfaces to receive solder and flow solder into
joint. Fill joint completely. Completely remove flux and spatter from exposed surfaces.
3.3 ROOF FLASHING INSTALLATION
A. General: Install sheet metal flashing and trim to comply with performance requirements, sheet
metal manufacturer's written installation instructions, and SMACNA's "Architectural Sheet Metal
Manual." Provide concealed fasteners where possible, set units true to line, and level as
indicated. Install work with laps, joints, and seams that will be permanently watertight and
weather resistant.
B. Pipe or Post Counterflashing: Install counterflashing umbrella with close -fitting collar with top
edge flared for elastomeric sealant, extending a minimum of 4 inches over base flashing. Install
stainless-steel draw band and tighten.
C. Counterflashing: Coordinate installation of counterflashing with installation of base flashing.
Insert counterflashing in reglets or receivers and fit tightly to base flashing. Extend
counterflashing 4 inches over base flashing. Lap counterflashing joints a minimum of 4 inches
and bed with sealant. Secure in a waterproof manner by means of snap-in installation and
sealant or lead wedges and sealant.
D. Roof-Penetration Flashing: Coordinate installation of roof -penetration flashing with installation
of roofing and other items penetrating roof. Seal with elastomeric sealant and clamp flashing to
pipes that penetrate roof.
3.4 CUSTOM-FABRICATED SHEET METAL ROOFING INSTALLATION
A. Fabricate and install work with lines and corners of exposed units true and accurate. Form
exposed faces flat and free of buckles, excessive waves, and avoidable tool marks, considering
temper and reflectivity of metal. Provide uniform, neat seams with minimum exposure of solder,
welds, and sealant. Fold back sheet metal to form a hem on concealed side of exposed edges
unless otherwise indicated.
1. Install cleats to hold sheet metal panels in position. Attach each cleat with two fasteners
to prevent rotation.
2. Fasten cleats not more than 12 inches o.c. Bend tabs over fastener head.
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B. Flat-Seam Roofing: Attach flat-seam metal panels to substrate with cleats, starting at eave and
working upward toward ridge. After panels are in place, mallet seams and fully solder.
3.5 ERECTION TOLERANCES
A. Installation Tolerances: Shim and align sheet metal flashing and trim within installed tolerance
of 1/4 inch in 20 feet on slope and location lines as indicated and within 1/8 -inch offset of
adjoining faces and of alignment of matching profiles.
B. Installation Tolerances: Shim and align sheet metal flashing and trim within installed tolerances
specified in MCA's "Guide Specification for Residential Metal Roofing."
3.6 CLEANING AND PROTECTION
A. Clean exposed metal surfaces of substances that interfere with uniform oxidation and
weathering.
B. Clean and neutralize flux materials. Clean off excess solder.
C. Clean off excess sealants.
D. Remove temporary protective coverings and strippable films as sheet metal flashing and trim
are installed unless otherwise indicated in manufacturer's written installation instructions. On
completion of installation, remove unused materials and clean finished surfaces. Maintain in a
clean condition during construction.
E. Replace sheet metal flashing and trim that have been damaged or that have deteriorated
beyond successful repair by finish touchup or similar minor repair procedures.
3.7 WASTE DISPOSAL
A. Unless otherwise indicated, excess materials are Contractor's property. At completion of
roofing work, remove from Project site.
1. Separate, salvage, recycle, and legally dispose of materials in accordance with the
Commonwealth of Massachusetts Waste Ban, 310 CMR 19.017.
END OF SECTION
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JOINT SEALANTS 07920 - 1 of 7
SECTION 07920
JOINT SEALANTS
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 1 Specification Sections, apply to this Section.
1.2
SUMMARY
A. Section Includes:
1. Silicone joint sealants.
2. Urethane joint sealants.
B. Related Sections include the following:
1. Section 07315 “Slate Shingles.”
1.3 PRECONSTRUCTION TESTING
A. Preconstruction Compatibility and Adhesion Testing: Submit to joint-sealant manufacturers, for
testing indicated below, samples of materials that will contact or affect joint sealants.
1. Use ASTM C 1087 to determine whether priming and other specific joint preparation
techniques are required to obtain rapid, optimum adhesion of joint sealants to joint
substrates.
2. Submit not fewer than eight pieces of each type of material, including joint substrates,
shims, joint-sealant backings, secondary seals, and miscellaneous materials.
3. Schedule sufficient time for testing and analyzing results to prevent delaying the Work.
4. For materials failing tests, obtain joint-sealant manufacturer's written instructions for
corrective measures including use of specially formulated primers.
5. Testing will not be required if joint-sealant manufacturers submit joint preparation data
that are based on previous testing of current sealant products for adhesion to, and
compatibility with, joint substrates and other materials matching those submitted.
1.4 PERFORMANCE REQUIREMENTS
A. Provide elastomeric joint sealants that establish and maintain watertight and airtight continuous
joint seals without staining or deteriorating joint substrates.
B. Provide joint sealants for interior applications that establish and maintain airtight and water-
resistant continuous joint seals without staining or deteriorating joint substrates.
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1.5 ACTION SUBMITTALS
A. Product Data: For each joint-sealant product indicated.
B. Samples for Initial Selection: Manufacturer's color charts consisting of strips of cured sealants
showing the full range of colors available for each product exposed to view.
C. Samples for Verification: For each type and color of joint sealant required, provide Samples
with joint sealants in 1/2-inch- wide joints formed between two 6-inch- long strips of material
matching the appearance of exposed surfaces adjacent to joint sealants.
D. Joint-Sealant Schedule: Include the following information:
1. Joint-sealant application, joint location, and designation.
2. Joint-sealant manufacturer and product name.
3. Joint-sealant formulation.
4. Joint-sealant color.
1.6 INFORMATIONAL SUBMITTALS
A. Product Certificates: For each type of joint sealant and accessory, signed by product
manufacturer.
B. Qualification Data: For Installer.
C. Compatibility and Adhesion Test Reports: From sealant manufacturer, indicating the following:
1. Materials forming joint substrates and joint-sealant backings have been tested for
compatibility and adhesion with joint sealants.
2. Interpretation of test results and written recommendations for primers and substrate
preparation needed for adhesion.
D. Product Test Reports: Based on comprehensive testing of product formulations performed by a
qualified testing agency, indicating that sealants comply with requirements.
E. Preconstruction Compatibility and Adhesion Test Reports: From sealant manufacturer,
indicating the following:
1. Materials forming joint substrates and joint-sealant backings have been tested for
compatibility and adhesion with joint sealants.
2. Interpretation of test results and written recommendations for primers and substrate
preparation needed for adhesion.
F. Warranties: Special warranties specified in this Section.
1.7 QUALITY ASSURANCE
A. Installer Qualifications: Manufacturer's authorized Installer who is approved or licensed for
installation of elastomeric sealants required for this Project.
B. Source Limitations: Obtain each type of joint sealant through one source from a single
manufacturer.
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C. Product Testing: Test joint sealants using a qualified testing agency.
1. Testing Agency Qualifications: An independent testing agency qualified according to
ASTM C 1021 to conduct the testing indicated.
2. Test according to SWRI's Sealant Validation Program for compliance with requirements
specified by reference to ASTM C 920 for adhesion and cohesion under cyclic
movement, adhesion-in-peel, and indentation hardness.
D. Mockups: Build mockups incorporating sealant joints, as follows, to verify selections made
under sample submittals and to demonstrate aesthetic effects and set quality standards for
materials and execution:
1. Joints in mockups of assemblies specified in other Sections that are indicated to receive
elastomeric joint sealants, which are specified by reference to this Section.
2. Each type of sealant and joint substrate indicated.
E. Preinstallation Conference: Conduct conference at Project site.
1.8 PROJECT CONDITIONS
A. Do not proceed with installation of joint sealants under the following conditions:
1. When ambient and substrate temperature conditions are outside limits permitted by joint-
sealant manufacturer or are below 40 deg F.
2. When joint substrates are wet.
3. Where joint widths are less than those allowed by joint-sealant manufacturer for
applications indicated.
4. Contaminants capable of interfering with adhesion have not yet been removed from joint
substrates.
1.9 WARRANTY
A. Special Installer's Warranty: Installer's standard form in which Installer agrees to repair or
replace elastomeric joint sealants that do not comply with performance and other requirements
specified in this Section within specified warranty period.
1. Warranty Period: Two years from date of Substantial Completion.
B. Special Manufacturer's Warranty: Manufacturer's standard form in which elastomeric sealant
manufacturer agrees to furnish elastomeric joint sealants to repair or replace those that do not
comply with performance and other requirements specified in this Section within specified
warranty period.
1. Warranty Period: Five years from date of Substantial Completion.
C. Special warranties specified in this Article exclude deterioration or failure of elastomeri c joint
sealants from the following:
1. Movement of the structure resulting in stresses on the sealant exceeding sealant
manufacturer's written specifications for sealant elongation and compression caused by
structural settlement or errors attributable to design or construction.
2. Disintegration of joint substrates from natural causes exceeding design specifications.
3. Mechanical damage caused by individuals, tools, or other outside agents.
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4. Changes in sealant appearance caused by accumulation of dirt or other atmospheric
contaminants.
PART 2 - PRODUCTS
2.1 MATERIALS, GENERAL
A. Compatibility: Provide joint sealants, backings, and other related materials that are compatible
with one another and with joint substrates under conditions of service and application, as
demonstrated by joint-sealant manufacturer, based on testing and field experience.
B. Liquid-Applied Joint Sealants: Comply with ASTM C 920 and other requirements indicated for
each liquid-applied joint sealant specified, including those referencing ASTM C 920
classifications for type, grade, class, and uses related to exposure and joint substrates.
C. Stain-Test-Response Characteristics: Where sealants are specified to be nonstaining to porous
substrates, provide products that have undergone testing according to ASTM C 1248 and have
not stained porous joint substrates indicated for Project.
D. Colors of Exposed Joint Sealants: As selected by Architect from manufacturer's full range.
2.2 URETHANE JOINT SEALANTS
A. Single-Component, Nonsag, Urethane Joint Sealant: ASTM C 920, Type S, Grade NS,
Class 25, for Use NT.
1. Products: Subject to compliance with requirements, provide one of the following:
a. BASF Corporation-Construction Systems; MasterSeal NP 1.
b. Pecora Corporation; Dynatrol I-XL.
c. Sherwin Williams; Loxon 1K Smooth.
d. Tremco; Dymonic.
B. Multicomponent, Nonsag, Urethane Joint Sealant: ASTM C 920, Type M, Grade NS, Class 50,
for Use NT.
1. Products: Subject to compliance with requirements, provide one of the following:
a. BASF Corporation-Construction Systems; MasterSeal NP 2.
b. Pecora Corporation; Dynatrol II.
c. Sherwin Williams; Loxon 2K NS.
d. Tremco; Dymeric 240 FC.
2.3 JOINT-SEALANT BACKING
A. General: Provide sealant backings of material and type that are nonstaining; are compatible
with joint substrates, sealants, primers, and other joint fillers; and are approved for applications
indicated by sealant manufacturer based on field experience and laboratory testing.
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B. Cylindrical Sealant Backings: ASTM C 1330, Type C (closed -cell material with a surface skin)
as approved in writing by joint-sealant manufacturer for joint application indicated, and of size
and density to control sealant depth and otherwise contribute to producing optimum sealant
performance.
C. Bond-Breaker Tape: Polyethylene tape or other plastic tape recommended by sealant
manufacturer for preventing sealant from adhering to rigid, inflexible joint -filler materials or joint
surfaces at back of joint where such adhesion would result in sealant f ailure. Provide self-
adhesive tape where applicable.
2.4 MISCELLANEOUS MATERIALS
A. Primer: Material recommended by joint-sealant manufacturer where required for adhesion of
sealant to joint substrates indicated, as determined from preconstruction joint -sealant-substrate
tests and field tests.
B. Cleaners for Nonporous Surfaces: Chemical cleaners acceptable to manufacturers of sealants
and sealant backing materials, free of oily residues or other substances capable of staining or
harming joint substrates and adjacent nonporous surfaces in any way, and formulated to
promote optimum adhesion of sealants to joint substrates.
C. Masking Tape: Nonstaining, nonabsorbent material compatible with joint sealants and surfaces
adjacent to joints.
PART 3 - EXECUTION
3.1 EXAMINATION
A. Examine joints indicated to receive joint sealants, with Installer present, for compliance with
requirements for joint configuration, installation tolerances, and other conditions affecting joint -
sealant performance.
B. Proceed with installation only after unsatisfactory conditions have been corrected.
3.2 PREPARATION
A. Surface Cleaning of Joints: Clean out joints immediately before installing joint sealants to
comply with joint-sealant manufacturer's written instructions and the following requirements:
1. Remove all foreign material from joint substrates that could interfere with adhesion of
joint sealant, including dust, paints (except for permanent, protective coatings tested and
approved for sealant adhesion and compatibility by sealant manufacturer), old joint
sealants, oil, grease, waterproofing, water repellents, water, surface dirt, and frost.
2. Clean porous joint substrate surfaces by brushing, grinding, blast cleaning, mechanical
abrading, or a combination of these methods to produce a clean, sound su bstrate
capable of developing optimum bond with joint sealants. Remove loose particles
remaining after cleaning operations above by vacuuming or blowing out joints with oil-free
compressed air. Porous joint substrates include the following:
a. Concrete.
b. Masonry.
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3. Remove laitance and form-release agents from concrete.
4. Clean nonporous surfaces with chemical cleaners or other means that do not stain, harm
substrates, or leave residues capable of interfering with adhesion of joint sealants.
Nonporous joint substrates include the following:
a. Metal.
b. Glass.
c. Porcelain enamel.
d. Glazed surfaces of ceramic tile.
B. Joint Priming: Prime joint substrates, where recommended in writing by joint-sealant
manufacturer, based on preconstruction joint-sealant-substrate tests or prior experience. Apply
primer to comply with joint-sealant manufacturer's written instructions. Confine primers to areas
of joint-sealant bond; do not allow spillage or migration onto adjoining surfaces.
C. Masking Tape: Use masking tape where required to prevent contact of sealant with adjoining
surfaces that otherwise would be permanently stained or damaged by such contact or by
cleaning methods required to remove sealant smears. Remove tape immediately after tooling
without disturbing joint seal.
3.3 INSTALLATION OF JOINT SEALANTS
A. General: Comply with joint-sealant manufacturer's written installation instructions for products
and applications indicated, unless more stringent requirements apply.
B. Sealant Installation Standard: Comply with recommendations in ASTM C 1193 for use of joint
sealants as applicable to materials, applications, and conditions indicated.
C. Install sealant backings of type indicated to support sealants during application and at position
required to produce cross-sectional shapes and depths of installed sealants relative to joint
widths that allow optimum sealant movement capability.
1. Do not leave gaps between ends of sealant backings.
2. Do not stretch, twist, puncture, or tear sealant backings.
3. Remove absorbent sealant backings that have become wet before sealant application
and replace them with dry materials.
D. Install bond-breaker tape behind sealants where sealant backings are not used between
sealants and backs of joints.
E. Install sealants using proven techniques that comply with the following and at the same time
backings are installed:
1. Place sealants so they directly contact and fully wet joint substrates.
2. Completely fill recesses in each joint configuration.
3. Produce uniform, cross-sectional shapes and depths relative to joint widths that allow
optimum sealant movement capability.
F. Tooling of Nonsag Sealants: Immediately after sealant application and before skinning or
curing begins, tool sealants according to requirements specified below to form smooth, uniform
beads of configuration indicated; to eliminate air pockets; and to ensure contact and adhesion of
sealant with sides of joint.
1. Remove excess sealant from surfaces adjacent to joints.
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2. Use tooling agents that are approved in writing by sealant manufacturer and that do not
discolor sealants or adjacent surfaces.
3. Provide concave joint configuration per Figure 5A in ASTM C 1193, unless otherwise
indicated.
3.4 CLEANING
A. Clean off excess sealant or sealant smears adjacent to joints as the Work progresses by
methods and with cleaning materials approved in writing by manufacturers of joint sealants and
of products in which joints occur.
3.5 PROTECTION
A. Protect joint sealants during and after curing period from contact with contaminating substances
and from damage resulting from construction operations or other causes so sealants are without
deterioration or damage at time of Substantial Completion. If, despite such protection, damage
or deterioration occurs, cut out and remove damaged or deteriorated joint sealants immediately
so installations with repaired areas are indistinguishable from original work.
END OF SECTION