2 Hour Fire Wall Concrete Block

Penetrations penetrations through fire walls such as for pipes and cables must be.

2 hour fire wall concrete block.

Westbrook block is a proud producer of underwriters laboratories ul approved fire rated cmu in both light weight and normal weight densities in 2 3 and 4 hour configurations. B for group h 1 h 2 or continue reading detailing concrete masonry fire walls. 2 ncma tek 7 1c table 1 fire resistance rating period of concrete masonry assemblies refs. Concrete masonry fire resistance.

The fire resistance rating of concrete masonry walls depends on the type of aggregate used in the units. Table 1 required fire wall fire resistance ratings ref. 13 mm a 1 in. 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.

Fire barrier walls are typically constructed of drywall or gypsum board partitions with wood or metal framed studs. 51 mm thickness can be used. Building and structural firewalls in north america are usually made of concrete concrete blocks or reinforced concrete older fire walls built prior to world war ii used brick materials. 25 mm thickness measured perpendicular to the face of the wall of ceramic fiber in the joint can be used in walls with fire resistance ratings up to 3 hours while a 2 in.

Concrete masonry noncombustible constructionis a. 1 groupfire resistance rating hr a b e h 4 i r 1 r 2 u3a f 1 h 3b h 5 m s 13 h 1 h 24b f 2 s 2 r 3 r 42 a walls shall not be less than 2 hour fire resistance rated where separating buildings of type ii or v construction. Equivalent thickness in for standard concrete block widths 1cores can be filled with grout loose fill insulation or aggregate meeting astm c 33 ref. For example for an 8 in.

These wall assembly files are used for planning and estimation purposes for many ul wall types such as fire rated wall assemblies. These blocks while allowing for safe means of egress and fire rating should no longer be looked at as just normal grey cmu. 4 or c 331 ref. Standard northwest block wall ratings.

Some of the above listed shapes are non stock items. 1 2 3 aggregate type in the minimum required equivalent thickness in. Usg provides resources here for our ul wall assemblies for seamless integration into any construction project. Walls composed of hollow concrete masonry units having a nominal thickness of 8 inches or greater and having a fire resistance rating of at least 2 hours shall be classified as 4 hours when the hollow spaces are completely filled with perlite or vermiculite grout or a material such as expanded.