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.

2 hour fire wall concrete block.

These blocks while allowing for safe means of egress and fire rating should no longer be looked at as just normal grey cmu. Fire barrier walls are typically constructed of drywall or gypsum board partitions with wood or metal framed studs. These wall assembly files are used for planning and estimation purposes for many ul wall types such as fire rated wall assemblies. 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.

4 or c 331 ref. 13 mm a 1 in. Some of the above listed shapes are non stock items. Concrete masonry fire resistance.

For example for an 8 in. 203 mm limestone aggregate concrete masonry wall with a maximum control joint width of in. 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. 2 ncma tek 7 1c table 1 fire resistance rating period of concrete masonry assemblies refs.

B for group h 1 h 2 or continue reading detailing concrete masonry fire walls. The fire resistance rating of concrete masonry walls depends on the type of aggregate used in the units. Linear interpolation from table 721 3 2 of the florida building code for exposed finish block mix 55 limestone 45 siliceous aggregates. 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. Equivalent thickness in for standard concrete block widths 1cores can be filled with grout loose fill insulation or aggregate meeting astm c 33 ref. Standard northwest block wall ratings. 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.

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. Penetrations penetrations through fire walls such as for pipes and cables must be. Table 1 required fire wall fire resistance ratings ref. Concrete masonry noncombustible constructionis a.