2 Hr Fire Rated Wall Construction

As applied to 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.

2 hr fire rated wall construction.

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. All other building classes including. Usg provides resources here for our ul wall assemblies for seamless integration into any construction project. The area separation wall system has been evaluated for code compliance in ul evaluation report ul er r3501 01.

Use thicker drywall for a two hour rating if double sheeting is not an option with fire resistant insulation between the wall studs. A 2 hour rating can be achieved by a wall with an equivalent thickness of as little as 3 1 5 inches when expanded slag or pumice is used or 4 1 2 inches when siliceous gravel is used as the aggregate. See general information for fire resistance ratings can ulc s101 certified for canada design criteria and allowable variances design no. Gyprock has developed a broad range of fire rated systems to help specifiers and builders meet the bca requirements with confidence.

Permitted in type v construction fire walls in type v construction of a b e r and several other occupancies may be 2 hour fire walls in type iii and iv construction are required to be constructed of non combustible materials opportunity for wood frame bearing. Class 2 to 9 buildings. The area separation wall system has a non bearing wall rating of 2 hours and is listed in the ul fire resistance directory as design no. U347 and in the ga 600 fire resistance manual as file numbers asw 0800 asw 0981 and asw 0998.

These wall assembly files are used for planning and estimation purposes for many ul wall types such as fire rated wall assemblies. An area separation wall is a component of townhouse construction used where townhouse share a common wall. Building codes have special requirements for the walls separating adjacent townhome units and the primary requirement is that they serve as two hour firewalls meaning that fire in one unit will require at least two hours before breaking through the wall. For this reason a fire rated drywall is sometimes called one hour fire wallboard.

Cover wood framed walls with a single layer of 3 4 inch type x drywall rated for 120 minutes of fire resistance. The bca includes requirements for fire performance of walls and ceilings to help ensure occupant safety in the event of a fire.