Roof Enclosure For Shaft Wall

The enclosure walls end at the roof deck as required for fire barriers.

Roof enclosure for shaft wall.

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

In addition usg cavity shaft wall can be used to provide horizontal protection for corridor ceilings underside of stairwells and other applications. 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. 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.

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. Shaft enclosure for hvac ductwork and roof drain pipes extends from ground floor slab up through the roof of a 2 story building. Sw 104 1 hour shaftwall to steel deck. Head of wall firestop system elastomeric spray firestop.

1 hour corridor ceiling assembly with single layer 5 8 gypsum panels. Stairwall systems are designed to enclose stairwalls this system is finished on both sides with a single layer of 1 2 fire code board. Fire barriers do not extend above the roof deck. 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. 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. Usg shaft wall systems installed horizontally provide economical construction for fire resistive duct enclosures corridors ceilings and stairway soffits.