Roof Enclosure For Shaft Wall

Shaft enclosures that are permitted to be penetrated by ducts and air transfer openings shall be protected with approved fire and smoke dampers installed in accordance with their listing.

Roof enclosure for shaft wall.

Shaft enclosures are specifically addressed in section 713 of the 2015 international building code ibc. 1 hour corridor ceiling assembly with single layer 5 8 gypsum panels. In addition usg cavity shaft wall can be used to provide horizontal protection for corridor ceilings underside of stairwells and other applications. Head of wall firestop system elastomeric spray firestop.

Fire dampers are not required at penetrations of shafts where. Usg shaft wall systems installed horizontally provide economical construction for fire resistive duct enclosures corridors ceilings and stairway soffits. Shaft enclosures are specifi cally addressed in ibc section 713. Installation detail for transition to rated vertical shaft xl009 23 installation detail for transition to rated horizontal shaft xl015 24 installation detail for grease hoods xl022 25 optimized grease duct enclosure system 26 installation pictures good installations and bad access door examples 27.

However because shaft enclosure walls are to be constructed as fire barriers per section 713 2 many shaft wall requirements directly reference provisions on fire barriers found in section 707. Walls above the roof deck are per the building construction type for exterior walls ch6 14 15 and ch7 section 704. Sw 104 1 hour shaftwall to steel deck. The enclosure walls end at the roof deck as required for fire barriers.

Above the roof the shaft enclosure is a penthouse with walls to about 30 inches above the roof and then 48 inch high louvers up to the roof of the shaft penthouse. Openings in exterior walls are per table 704 8. Fire barriers do not extend above the roof deck. Stairwall systems are designed to enclose stairwalls this system is finished on both sides with a single layer of 1 2 fire code board.

Below the roof the shaft enclosure has a 2 hour rating. Shaftwall system consists of 1 shaftliner panels supported by 2 1 2 4 or 6 c t studs and faced on one side with two layers of 1 2 fire code board. However because shaft enclosure walls are to be constructed as fi re barriers per section 713 2 many shaft wall require ments directly reference provisions of fi re barriers found in section 707.