2 Hour Fire Wall Concrete Block

Equivalent thickness in for standard concrete block widths 1cores can be filled with grout loose fill insulation or aggregate meeting astm c 33 ref.

2 hour fire wall concrete block.

13 mm a 1 in. 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. 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.

2 ncma tek 7 1c table 1 fire resistance rating period of concrete masonry assemblies refs. Standard northwest block wall ratings. 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. Table 1 required fire wall fire resistance ratings ref.

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

Fire barrier walls are typically constructed of drywall or gypsum board partitions with wood or metal framed studs. 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. Concrete masonry fire resistance. 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. 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. Concrete masonry noncombustible constructionis a. 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.

4 or c 331 ref. For example for an 8 in. B for group h 1 h 2 or continue reading detailing concrete masonry fire walls. These blocks while allowing for safe means of egress and fire rating should no longer be looked at as just normal grey cmu.