2 Hour Fire Wall Concrete Block

Linear interpolation from table 721 3 2 of the florida building code for exposed finish block mix 55 limestone 45 siliceous aggregates.

2 hour fire wall concrete block.

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

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

13 mm a 1 in. Standard northwest block wall ratings. Some of the above listed shapes are non stock items. 203 mm limestone aggregate concrete masonry wall with a maximum control joint width of in.

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. Usg provides resources here for our ul wall assemblies for seamless integration into any construction project. Table 1 required fire wall fire resistance ratings ref. Concrete masonry noncombustible constructionis a.

4 or c 331 ref. B for group h 1 h 2 or continue reading detailing concrete masonry fire walls. 1 2 3 aggregate type in the minimum required equivalent thickness in. 2 ncma tek 7 1c table 1 fire resistance rating period of concrete masonry assemblies refs.

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. For example for an 8 in. Penetrations penetrations through fire walls such as for pipes and cables must be. Fire barrier walls are typically constructed of drywall or gypsum board partitions with wood or metal framed studs.