2 Hour Fire Wall Concrete Block

The fire resistance rating of concrete masonry walls depends on the type of aggregate used in the units.

2 hour fire wall concrete block.

Usg provides resources here for our ul wall assemblies for seamless integration into any construction project. 203 mm limestone aggregate concrete masonry wall with a maximum control joint width of in. Some of the above listed shapes are non stock items. 1 2 3 aggregate type in the minimum required equivalent thickness in.

Concrete masonry fire resistance. Concrete masonry noncombustible constructionis a. 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.

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. B for group h 1 h 2 or continue reading detailing concrete masonry fire walls. 51 mm thickness can be used.

For example for an 8 in. 13 mm a 1 in. These wall assembly files are used for planning and estimation purposes for many ul wall types such as fire rated wall assemblies. 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.

2 ncma tek 7 1c table 1 fire resistance rating period of concrete masonry assemblies refs. 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. 4 or c 331 ref. 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. Linear interpolation from table 721 3 2 of the florida building code for exposed finish block mix 55 limestone 45 siliceous aggregates. 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.