Section 27-237
§ 27-237 Occupancy groups. Table 3-1 lists occupancy groups and sub
groups that shall be established for classifying buildings and spaces in
accordance with the provisions of articles three through twelve of this
subchapter.
Table 3-1 Occupancy Classifications
Fire
Occupancy Group Classification Index
A High hazard 4
B-1 Storage (moderate hazard) 3
B-2 Storage (low hazard) 2
C Mercantile 2
D-1 Industrial (moderate hazard) 3
D-2 Industrial (low hazard) 2
E Business 2
F-1a Assembly (theaters, etc.) 1
F-1b Assembly (churches, concert halls, etc.) 1
F-2 Assembly (outdoors) 1
F-3 Assembly (museums, etc.) 1
F-4 Assembly (restaurants, etc.) 1
G Education 1
H-1 Institutional (restrained) 1
H-2 Institutional (incapacitated) 1
J-1 Residential (hotels, etc.) 1
J-2 Residential (apartment houses, etc.) 1
J-3 Residential (one-and two-family dwellings) 1
K Miscellaneous
Section 27-238
§ 27-238 Classification of spaces. Every space or room hereafter
altered or erected shall, for the purposes of this code, be classified
in one of the occupancy groups listed in Table 3-1 according to the
occupancy or use of the space or room.
Section 27-239
§ 27-239 Classification of buildings. Every building hereafter erected
or altered under the provisions of section 27-115 of article four of
subchapter one of this chapter shall, for the purposes of this code, be
classified in one of the occupancy groups listed in table 3-1 according
to the main use or dominant occupancy of the building. However, at the
option of the applicant, subject to the approval of the commissioner,
buildings may be classified in any other occupancy group, provided such
occupancy group has a higher fire index, as listed in table 3-1, than
the fire index of the occupancy group classification of the main use or
dominant occupant.
Section 27-240
§ 27-240 Separation of occupancies. Occupancies within buildings shall
be separated from one another as follows:
a. Spaces classified in occupancy groups having a higher fire index,
as listed in table 3-1, than the fire index of the occupancy group
classification of the building, shall be separated from adjoining spaces
by construction meeting the fire-resistance rating requirements for fire
divisions under the provisions of subdivision (a) of section 27-339 of
article five of subchapter five of this chapter. Such occupancies shall,
for the purposes of this code, be classified and treated as separate
buildings (hereinafter referred to as "building section").
b. Spaces classified in occupancy groups having the same or lower fire
index, as listed in table 3-1, than the fire index of the occupancy
group classification of the building, shall be separated from adjoining
spaces by construction meeting the fire-resistance rating requirements
for fire separations under the provisions of subdivision (b) of section
27-339 of article five of subchapter five of this chapter.
Section 27-241
§ 27-241 Classification tables. Table 3-2 and reference standard RS3-3
list representative occupancies that shall be used as a basis for
classifying buildings and spaces by occupancy.
Section 27-242
§ 27-242 Multiple occupancy or use. When a building or space is used
for multiple purposes, involving different activities at different
times, the building or space shall be given a separate occupancy group
classification for each of the activities involved. The design and
construction of the building or space shall be in accordance with the
most restrictive provisions of this code that apply to any of the
occupancy group classifications utilized. However, a minor variation of
any occupancy or use of a space from technical compliance with a
particular space occupancy classification shall not be prohibited if
such variation is normally associated with the occupancy classification
and no specific danger or hazard is created.