Roof Enclosure For Shaft Wall

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.

Roof enclosure for shaft wall.

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. Ul design u499 w419. Walls above the roof deck are per the building construction type for exterior walls ch6 14 15 and ch7 section 704. Usg shaft wall systems installed horizontally provide economical construction for fire resistive duct enclosures corridors ceilings and stairway soffits.

Fire barriers do not extend above the roof deck. 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. 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.

The enclosure walls end at the roof deck as required for fire barriers. 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. Below the roof the shaft enclosure has a 2 hour rating. Sw 104 1 hour shaftwall to steel deck.

In addition usg cavity shaft wall can be used to provide horizontal protection for corridor ceilings underside of stairwells and other applications. Shaft enclosure for hvac ductwork and roof drain pipes extends from ground floor slab up through the roof of a 2 story building. Shaft enclosures are specifically addressed in section 713 of the 2015 international building code ibc. Usg cavity shaft wall can be used in elevator and mechanical shafts air ducts stairwells and areas where wall construction is only available from one side.

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. Shaft enclosures are specifi cally addressed in ibc section 713. Fire dampers are not required at penetrations of shafts where.