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FIRE-RESISTANCE-RATED CONSTRUCTION 707.13.4-708.4 707.13.4 Termination room. Refuse and laundry chutes 1. Walls separating dwelling units. shall discharge into an enclosed room completely separat- 2. Walls separating guestrooms in occupancies in Group ed from the remainder of building by construction that has R-1. a fire resistance rating of not less than 1 hour and openings into the termination room shall be protected by opening 3. Walls separating tenant spaces in covered mall build- protectives having a fire-protection rating of not less than Ings' 3/4 hour and shall be self-closing or automatic-closing 4. Corridor walls. upon the detection of smoke. Refuse chutes shall not ter- minate in an incinerator room. Refuse and laundry rooms 708.2 Materials.The walls shall be of materials permitted by that are not provided with chutes need only comply with the building type of construction. Table 302.1.1. 708.3 Fire-resistance rating. The fire-resistance rating of 707.13.5 Incinerator room.Incinerator rooms shall com- the walls shall be I hour. ply with Table 302.1.1. 707.13.6 Automatic fire sprinkler system.An approved Exceptions: automatic fire sprinkler system shall be installed in accor 1. Corridor walls as permitted by Table 1004.3.2.1. dance with Section 903.2.12.2. 2. Dwelling unit and guestroom separations in build- ings of Types IIB, IIIB and VB construction shall 707.14 Elevator and dumbwaiter shafts.Elevator hoistway have fire-resistance ratings of not less than 1/2 hour and dumbwaiter enclosures shall be constructed in accor- in buildings equipped throughout with an automatic dance with Section 707.4 and Chapter 30. sprinkler system in accordance with Section �`\ 707.14.1 Elevator lobby. Elevators opening into a fire- 903.3.1.1. resistance-rated corridor as required by Section 1004.3.2.1 shall be provided with an elevator lobby at each floor con- 708.4 Continuity.Fire partitions shall extend from the top of the floor assembly below to the underside of the floor or roof taining such a corridor. The lobby shall completely sepa- slab or deck above or to the fire-resistance-rated floor/ceiling rate the elevators from the corridor by fire barriers and the or roof/ceiling assembly above, and shall be securely required opening protection.Elevator lobbies shall have at attached thereto. If the partitions are not continuous to the least one means of egress complying with Chapter 10 and deck,and where constructed of combustible construction,the other provisions within this code. space between the ceiling and the deck above shall be fire- Exceptions: blocked or draftstopped in accordance with Sections 716.2.1 1. In office buildings,separations are not required from and 716.3.1 at the partition line.The supporting construction a street floor elevator lobby provided the entire shall be protected to afford the required fire-resistance rating street floor is equipped with an automatic sprinkler of the wall supported,except for tenant and guestroom sepa- system in accordance with Section 903.3.1.1. ration walls and exit access corridor walls in buildings of Types IIB, IIIB, and VB construction. 4)2. Elevators not required to be located in a shaft in accordance with Section 707.2. Exceptions: 7 3. Where additional doors are provided in accor- 1. The wall need not be extended into the crawl space dance with Section 3002.6. below where the floor above the crawl space has a 7 At 4. In other than Groups I-2 and I-3, and buildings minimum 1-hour fire-resistance rating. more than four stories above the lowest level of 2. Where the room-side fire-resistance-rated mem- _____; fire department vehicle access, lobby separation brane of the corridor is carried through to the under- is not required where the building,including the side of a fire-resistance-rated floor or roof above, lobby and corridors leading to the lobby, is pro- the ceiling of the corridor shall be permitted to be tected by an automatic sprinkler system installed protected by the use of ceiling materials as required throughout in accordance with Section 903.3.1.1 for a 1-hour fire-resistance-rated floor or roof sys- or 903.3.1.2. tern. SECTION 708 Jok, go4C. 3. Where the corridor ceiling is constructed as required FIRE PARTITIONS' _ mot- 3 L /0 for the corridor walls,the walls shall be permitted to terminate at the upper membrane of such ceiling 708.1 General. Wall assemblies installed as required by assembly. Sections 310.3, 402.7.2 and 1004.3.2.1 shall comply with 4. The fire partition separating tenant spaces in a mall, this section.These include: complying with Section 402.7.2,are not required to 2000 INTERNATIONAL BUILDING CODE® 103