2 Hour Fire Rated Wall

19 1 mm air space between the h stud assembly and any adjacent framing members.

2 hour fire rated wall.

For this reason a fire rated drywall is sometimes called one hour fire wallboard. Use steel studs and two layers of 1 2 inch type c drywall on each side of the studs for a two hour fire rating on an interior wall. Mount a 1 1 2 inch fiberglass barrier inside the studs. Line or at the parapet and at the ends of walls.

Elements of buildings the fire resistance rating classifies the ability of an assembly to confine and isolate fire within a zone comprised of fire resistance rated walls ceiling and floor assemblies. Use special fiberglass rated for use in firewalls. For a 2 hour fire rated assembly without the need for battens maintain a minimum 3 4 in. The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels.

Usg provides resources here for our ul wall assemblies for seamless integration into any construction project. There are many ways to meet the requirements for 2 hour fire rated separation walls including foundation to roof masonry walls separating the units. When you cannot maintain a minimum 3 4 in. If a conventional 1 2 inch thick sheet of drywall will stand up to 30 minutes of fire then the added 1 8 inch found in the type x drywall along with its other properties will double your margin of safety to 60 minutes.