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Williams Street NarrativeAUTOMATIC FIRE SPRINKLER SYSTEM NARRATIVE REPORT Williams Street 107 Williams Street Northampton, MA. Prepared By: JFV Engineering LLC. 10 Chestnut Hill Road South Hadley, Ma. 01075 License 9 46515 Expiration 6-30-2024 Prepared For: Northampton Building Department November 22, 2022 Section 1-Basis of Design 1.1 Building Description 1.1a This is an new 3-story apartment building with no basement. 1.1b The total square footage of the new building: 7,717 sq. ft. The first floor is 2,896 sq. ft. The second floor is 2,827 sq. ft. The third floor is 1,994 sq. ft. 1.lc The building height is approximately 39'4" at highest point of main structure. 1.1d This building has (3) story above grade 1.1 e See 1.1 b for square footage. 1. If Occupancy of Building: Residential (R-2), 1.1g The construction type is VB — Unprotected Wood Frame. 1.1 h There will be no hazardous materials stored within the facility. 1.1 i There is no high pile storage in the building. (No storage) 1. l j There is site access arrangement for emergency response vehicles. The front of the building on Williams Street. 1.2 Applicable Laws, Regulations and Standards NFPA 13R 2013 Installation of Sprinkler Systems in Low -Rise Residential Occupancies. NFPA 13 2013 Installation of Sprinkler Systems. The 2015 IBC & 9th Edition of the Massachusetts Building Code Amendments. 1.3 Design Responsibility for Fire Sprinkler System a.) The design responsibility of the fire sprinkler system is JFV Engineering LLC. 1.4 Fire Protection System to be Installed a.) Water Supply A new 2" service into the new building from the city main on Williams Street. b.) Automatic Fire Sprinkler System The fire sprinkler system shall be designed in accordance with NFPA 13R 2013 The fire sprinkler system shall be a wet system protecting the first floor through the third floor. Residential sprinklers shall be installed throughout the apartment units. Quick response sprinklers will be installed in the stairs and at exterior overhangs. The fire sprinkler system shall be hydraulically calculated in accordance with the requirements of NFPA l3R 2013. Light Hazard will be figured for apartment units. (.05 density) A new flow switch shall be installed in the new sprinkler room on the first floor of the building. The new flow switch will be located after the wet systems main drain valve. When the wet systems flow switch is activated by any flow of water equal to, or in excess of the discharge from one fire sprinkler. It shall send a signal to the new Fire Alarm Control Panel by owner. Tamper switches are installed on all the control valve. These switches shall monitor the movement of the control valves to ensure that they are not partially or completely closed. Activation of these switches shall send a signal to the new Fire Alarm Control Panel. (By others) c.) Standpipe System. This building does not meet the building code requirements for a standpipe system. d.) Sprinkler protection will not be required incombustible concealed spaces per NFPAI3R 2013 edition. e.) Flow Test. A flow test was conducted at 107 Williams Street on 11-14-2022 by Hampshire Fire protection LLC. and the Northampton Water Department. Static = 120 PSI Residual = 118 PSI Flow = 1453 GPM Orifice = 2 ''/2" hydrant butt Hydrant Coeff = .9 Pitot = 75 PSI Time = 5:00 A.M Section 2 — Sequence of Operation 2.1 Fire Sprinkler System Waterflow a) Upon sprinkler system waterflow, the following functions shall be performed: Indicate condition at Fire Alarm Panel b) Initiate building evacuation through building alarm system Transmit alarm signal to central stations 2.2 Control Valve Signal The fire sprinkler system control valves are equipped with tamper switches to indicate either partial or complete closure. The tamper switches shall send a signal to the Fire Alarm Panel. Section 3- Testing Criteria 3.1 Personnel a) The installing contractor shall notify the owner's representative, and the local fire department of the testing schedule for the installation of the fire sprinkler system so that each may be represented at the time of testing. b) Testing of the fire sprinkler system shall be in compliance with the requirements of NFPA 13 2013. A hydrostatic test of the fire sprinkler piping shall be performed at 200 psi for 2 hours. 3.2 Testing Equipment and Tools Record drawings Notification announcement Manufacturer's installation instructions, maintenance manuals, portable test pump and gauges, hoses and connections for piping hydrostatic test. 3.3 Approval Requirements A signed Contractor's Test and Material Certificate shall be given to each party as outlined in section 3-1 document system operation and testing.