Current through Register Vol. 49, No. 13, September 23, 2024
IFC section 1105 and all subsections are deleted and replaced
with the following:
1105.1
General. Mixed occupancies within the same building and hazardous
areas shall be separated in accordance with Sections 1105.2 through
1105.3.2.1.
1105.2
Occupancy
separations. Occupancy separations shall be provided in buildings
containing Group I and Group R occupancies as specified in Sections 1105.2.1
through 1105.2.3.1. These separations shall be constructed and maintained in
accordance with the Building Code. Existing wood lath and plaster in good
condition or 1/2-inch (12.7 mm) gypsum wallboard is acceptable where one-hour
occupancy separations are required.
1105.2.1
Door openings. Where one-hour fire-resistant construction is
required, openings shall be protected by listed fire doors, insulated steel
doors, 1-3/8-inch thick (35 mm) or 1-3/4-inch thick (45 mm) solid wood doors,
or fixed wired glass set in steel frames. Doors shall be self-closing or
automatic-closing by smoke detection.
1105.2.2
Group I-1 and Group I-2
occupancies. Group I-1 and Group I-2 occupancies shall be separated from
other occupancies as specified in the Building Code.
1105.2.3
Group I-3 occupancies.
Group I-3 occupancies shall be separated from other occupancies as specified in
the Building Code.
1105.2.3.1
Group I-3
compliance options. Occupancy separations need not be provided for Group
I-3 occupancies in the following conditions:
1. In buildings that are protected throughout
by an approved automatic sprinkler system, one-hour fire-resistance-rated
construction is permitted.
2. In
buildings that are protected throughout by an approved automatic sprinkler
system, openings for the passage of materials between the Group I-3 and
adjacent occupancies are not required to be fire-resistance rated when such
openings are not more than 4 feet (1,219 mm) above the floor and are provided
with a metal cover or door.
1105.2.4
Group R occupancies.
Group R occupancies and the exits therefrom shall be separated from Group A, B,
M, S, and U occupancies by at least one-hour fire-resistance-rated
construction. Group R occupancies shall be separated from all other occupancies
as specified in the Building Code.
1105.2.4.1
Group R compliance options. Occupancy separations need not be
provided for Group R occupancies in the following conditions:
1. In buildings that are protected throughout
by an approved automatic sprinkler system, one-hour occupancy separations need
not be provided.
2. An occupancy
separation need not be provided between Group A and Group R occupancies if the
building is provided with a fire alarm system having automatic smoke detection
throughout the Group A occupancy.
3. Fire-resistance-rated opening protection
need not be provided between Group A and Group R occupancies when such openings
are designed to resist the passage of smoke and the openings are protected by
an approved automatic sprinkler system.
4. An occupancy separation need not be
provided where two or more occupancies occur in the same building or structure
and are so intermingled that separations are impracticable provided that the
exit provisions and protection requirements for the more restrictive occupancy
are provided.
5. An occupancy
separation need not be provided between a Group R-3 occupancy with sleeping
accommodations for ten or fewer persons and Group B or Group M occupancies
which are accessory if interconnected smoke alarms are provided. At least one
smoke alarm shall be located in the Group B or Group M occupancy and additional
alarms may be needed in accordance with manufacturers instructions. Smoke
alarms in the sleeping areas shall be located as specified in Section 1103.8
and shall be audible in all sleeping areas.
1105.3
Incidental use
areas. Incidental use areas shall be separated from the rest of the
building in accordance with this section. Incidental use areas are defined as
shops, laboratories containing hazardous materials, laundry rooms exceeding 100
square feet in size, and rooms containing boilers or central heating plants
where the largest piece of fuel equipment exceeds 400,000 Btu per hour input.
1105.3.1
Separation required.
Incidental use areas in Groups A, B, E, F, H, I, M, R-1, R-2, and S occupancies
shall be separated from the rest of the building by not less than a one-hour
fire barrier. Existing wood lath and plaster in good condition or 1/2-inch
(12.7 mm) gypsum wallboard is acceptable where one-hour fire barriers are
required. Storage rooms need not be separated in Groups F, M, or S
occupancies.
1105.3.2
Sprinkler protection in lieu of separation. Incidental use areas
in Groups A, B, E, F, H, M, and S occupancies need not be separated when the
incidental use area is protected with automatic sprinklers.
1105.3.2.1
Groups I and R
occupancies. Incidental use areas in Groups I and R occupancies need not
be separated when the incidental use area is protected with automatic
sprinklers and the construction of such areas is capable of resisting the
passage of smoke. Doors to such areas shall be a minimum of one-hour
fire-rated, solid-core wood doors or insulated steel doors. Doors shall be
self-closing or automatic-closing by smoke detection.
