30A-032 LH Code Zea Mays Residential 2013-06-10IBC 310.1:
R-3 Residential occupancies where the occupants are primarily permanent in nature and not classified as Group R-1, R-2, R-4 or I, including:
Buildings that do not contain more than two dwelling units.
Adult care facilities that provide accommodations for five or fewer persons of any age for less than 24 hours.
Child care facilities that provide accommodations for five or fewer persons of any age for less than 24 hours.
Congregate living facilities with 16 or fewer persons.
Adult care and child care facilities that are within a single-family home are permitted to comply with the International Residential Code.
Mass 8th Amended 310.1
CONGREGATE LIVING FACILITIES. A building or part thereof that contains sleeping units where residents share bathroom and/or kitchen facilities.
Congregate living facilities are those pertaining to group housing (i.e., dormitories, fraternities, convents)
that combine individual sleeping quarters with communal
facilities for food, care, sanitation and recreation.
The number of occupants in the facility determines the
appropriate occupancy classification. There are two
thesholds: 10 and 16. A congregate living facility with
16 or fewer nontransient residents falls in the R-3
classification—for above 16 nontransient residents the
classification is R-2. For transient residents, if there
are 10 or fewer in the facility, it is also in the R-3 classification.
If over 10 transient residents, it is an R-1
occupancy.
IBC Code Commentary:
R-3: Group R-3 facilities include all detached one and
two-family dwellings and multiple (three or more)
single-family dwellings (townhouses) more than three
stories in height. Those buildings three or less stories
in height are not classified as Group R-3 and are regulated
by the IRC (see Section 101.2). Each pair of
dwelling units in multiple single-family dwellings
greater than three stories in height must be separated
by fire walls (see Section 706) or by two exterior walls
(see Table 602) in order to be classified as Group R-3.
(Duplexes, buildings with two dwelling units, must be
detached from other structures in order to be regulated
by the IRC.) A duplex attached to another duplex