2 Hour Fire Wall Concrete Block

1 2 3 aggregate type in the minimum required equivalent thickness in.

2 hour fire wall concrete block.

Usg provides resources here for our ul wall assemblies for seamless integration into any construction project. Mm for fi re resistance rating hoursa b concrete masonry unitc 4 33 4 31 2 31 4 3 23 4 21 2 21 4 2 13 4 11 2 11 4 1 3 4 1 2. These blocks while allowing for safe means of egress and fire rating should no longer be looked at as just normal grey cmu. Penetrations penetrations through fire walls such as for pipes and cables must be.

For example for an 8 in. Fire barrier walls are typically constructed of drywall or gypsum board partitions with wood or metal framed studs. 4 or c 331 ref. Concrete masonry noncombustible constructionis a.

Linear interpolation from table 721 3 2 of the florida building code for exposed finish block mix 55 limestone 45 siliceous aggregates. These wall assembly files are used for planning and estimation purposes for many ul wall types such as fire rated wall assemblies. 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. 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.

Concrete masonry fire resistance. 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. Equivalent thickness in for standard concrete block widths 1cores can be filled with grout loose fill insulation or aggregate meeting astm c 33 ref. Table 1 required fire wall fire resistance ratings ref.

51 mm thickness can be used. 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. The fire resistance rating of concrete masonry walls depends on the type of aggregate used in the units. 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.

Standard northwest block wall ratings. 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. 13 mm a 1 in.