§ 4-151. Fire and Smoke Protection Features; Section 708, Fire Partitions.

(a)

Section 708.1.1 is added to read as follows: "Tenant Separations." Walls separating tenant spaces in all occupancies shall be in accordance with Section 708.3.

Exception: Ancillary tenant spaces of use groups M or B that do not exceed three thousand (3,000) square feet located within a main mercantile occupancy do not have to be separated. Examples of such spaces are, but not limited to, optical services, banking services, prescription services, beauty shops and similar tenant spaces located within mercantile occupancies.

(b)

Section 708.4 is amended to read as follows: "Continuity." Fire partitions shall extend from the top of the floor assembly below to the underside of the floor/ceiling or roof ceiling assembly above, and shall be securely attached thereto. If the partitions are not continuous to the deck and where constructed of combustible construction, the space between the ceiling and the deck above shall be fireblocked or draftstopped in accordance with Section 718.2 and 718.3 of this Code 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 exit access corridor walls in buildings of Type IIB, IIIB, and VB construction. All hollow vertical spaces shall be fire stopped at every floor level as required in Section 721.0.

Exception: Tenant and guest room separation walls may terminate at the underside of a noncombustible ceiling in Use Group B, buildings having a complete supervised automatic sprinkler system.

(1)

The wall need not be extended into the crawlspace below where the floor above the crawlspace has a minimum one (1) hour fire-resistance-rating;

(2)

Where the room-side fire-resistance-rated membrane of the corridor is carried through to the underside of a fire-resistance-rated floor or roof above, the ceiling or the corridor shall be permitted to be protected by the use of ceiling materials as required for a one (1) hour fire-resistance-rated floor or roof system;

(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;

(4)

Fireblocking or draftstopping is not required at the partition line in Group R-2 buildings that do not exceed four (4) stories in height, provided that the attic space is subdivided by draftstopping in to areas not exceeding three thousand (3,000) square feet or above every two dwelling units, whichever is smaller;

(5)

Fireblocking or draftstopping is not required at the partition line in Use Group B, F, and S buildings equipped with an automatic sprinkler system installed throughout in accordance with Section 903.3.1.1 or 903.3.1.2 of this Code, and provided that automatic sprinklers are installed in combustible floor/ceiling and roof/ceiling spaces.

(c)

Section 708.4.1 is added to read as follows: "Continuity of Tenant Separation Fire Partitions." Tenant Separation Walls required by Section 708.1 and 708.1.1 of this Code shall be constructed to the floor or roof deck above, or may terminate at a ceiling where permitted, as provided in Table 708.4.1.

Table 708.4.1
Continuity of Tenant Separation Partitions

USE GROUP	WITHOUT FULL AUTOMATIC SPRINKLERS	WITH FULL AUTOMATIC SPRINKLERS PER 903.3	NOTES D = TENANT WALL TO DECK ABOVE, C = TENANT WALL TO CEILING ABOVE
A	D	D
B	D	C	See Exception 708.4, (5)
E	D	D
F	D	C	See Exception 708.4, (5)
H	D	D
I	D	D
M	D	D	See Section 708.1, Exception 1. for Kiosks See Section 708.1, Exception 2. for ancillary tenant spaces
R-1, Guestrooms	D	D	See 708.1, (b)
R, Dwelling Units	D	D	See Exception 708.4, (4) for R-2
S	D	C	See Exception 708.4, (5)

 

(CB-98-1991; CB-63-1995; CB-82-1998; CB-54-2002; CB-13-2009; CB-45-2012)