708 FIRE PARTITIONS
General. The following wall assemblies shall comply with
1. Walls separating dwelling
units in the same building.
2. Walls separating sleeping units in occupancies in
Group R-l hotel, R-2 and 1-1 occupancies.
3. Walls separating tenant spaces in covered mall buildings
as required by Section 402.7.2.
4. Corridor walls as required
by Section 1017.1.
5. Elevator lobby separation as required by
6. Residential aircraft hangars.
Materials. The walls shall be of materials permitted by
the building type of construction.
Fire-resistance rating. Fire partitions shall have a fire-resistance
rating of not less than 1 hour.
1. Corridor walls as permitted
by Table 1017.1.
2. Dwelling and sleeping unit separations in buildings of
Type lIB, IIIB and VB construction shall have fire-resistance
ratings of not less than 1/2 hour
in buildings equipped throughout with an automatic sprinkler
system in accordance with Section
Continuity. Fire partitions shall extend from the top
of the foundation or floor/ceiling assembly below to the underside
of the floor or roof sheathing, slab or deck above or to the
fire-resistance-rated floor/ceiling or roof/ceiling assembly
above, and shall be securely attached thereto. If the partitions
are not continuous to the sheathing, deck or slab, and where
constructed of combustible construction, the space between
the ceiling and the sheathing, deck or slab above shall be
fireblocked or drafts topped in accordance with Sections
717.2 and 717.3 at the partition
line. The supporting construction shall be protected to afford
the required fire-resistance rating of the wall supported,
except for tenant and sleeping unit separation walls and corridor
walls in buildings of Types lIB, IIIB and VB construction.
The wall need not be extended into the crawl space below
where the floor above the crawl space has a minimum 1-hour
2. Where the room-side fire-resistance-rated membrane of
the corridor is carried through to the underside of the
floor or roof sheathing, deck or slab of a fire-resistance-rated
floor or roof above, the ceiling of the corridor shall be
permitted to be protected by the use of ceiling materials
as required for a 1-hour fire-resistance-rated floor or
3. Where the corridor ceiling is constructed as required
for the corridor walls, the walls shall be permitted to
terminate at the upper membrane of such ceiling assembly.
The fire partition separating tenant spaces in a mall, complying
with Section 402.7.2, are not
required to extend beyond the underside of a ceiling that
is not part of a fire-resistance-rated assembly. A wall
is not required in attic or ceiling spaces above tenant
5. Fireblocking or draftstopping is not required at the
partition line in Group R-2 buildings that do not exceed
four stories in height, provided the attic space is subdivided
by draftstopping into areas not exceeding 3,000 square feet
(279 m2) or above every two dwelling units, whichever
6. Fireblocking or drafts topping is not required at the
partition line in buildings equipped with an automatic sprinkler
system installed throughout in accordance with
Section 903.3.1.1 or 903.3.1.2,
provided that automatic sprinklers are installed in combustible
floor/ceiling and roof/ceiling spaces.
Exterior walls. Where exterior walls serve as a part of
a required fire-resistance-rated separation, such walls shall
comply with the requirements of Section
704 for exterior walls, and the fire-resistance-rated
separation requirements shall not apply.
Exterior walls required to be fire-resistance rated in accordance
with Section 1014.5.1 for exterior
egress balconies, Section 1020.1.4
for exit enclosures and Section 1023.6
for exterior exit ramps and stairways.
Openings. Openings in a fire partition shall be protected
in accordance with Section 715.
Penetrations. Penetrations of fire partitions shall comply
with Section 712.
Joints. Joints made in or between fire partitions shall
comply with Section 713.
Ducts and air transfer openings. Penetrations in a fire
partition by ducts and air transfer openings shall comply
with Section 716.