Smoke partitions installed as required elsewhere in the code shall comply with this section.
Unless required elsewhere in the code, smoke partitions are not required to have a fire-resistance rating.
Smoke partitions shall extend from the top of the foundation or floor below to the underside of the floor or roof sheathing, deck or slab above or to the underside of the ceiling above where the ceiling membrane is constructed to limit the transfer of smoke.
Windows in smoke partitions shall be sealed to resist the free passage of smoke or be automatic-closing upon detection of smoke.
Doors in smoke partitions shall not include louvers.
Where required elsewhere in the code, doors in smoke partitions shall meet the requirements for a smoke and draft control door assembly tested in accordance with UL 1784. The air leakage rate of the door assembly shall not exceed 3.0 cubic feet per minute per square foot [0.015424 m3/(s • m2)] of door opening at 0.10 inch (24.9 Pa) of water for both the ambient temperature test and the elevated temperature exposure test. Installation of smoke doors shall be in accordance with NFPA 105.
Smoke and draft control doors complying only with UL 1784 shall be permitted to show the letter "S" on the manufacturer's labeling.
The space around penetrating items shall be filled with an approved material to limit the free passage of smoke.
The space around a duct penetrating a smoke partition shall be filled with an approved material to limit the free passage of smoke. Air transfer openings in smoke partitions shall be provided with a smoke damper complying with Section 722.214.171.124.