2 Hour Fire Wall Concrete Block

Standard northwest block wall ratings.

2 hour fire wall concrete block.

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. 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. 4 or c 331 ref.

Usg provides resources here for our ul wall assemblies for seamless integration into any construction project. B for group h 1 h 2 or continue reading detailing concrete masonry fire walls. Linear interpolation from table 721 3 2 of the florida building code for exposed finish block mix 55 limestone 45 siliceous aggregates. 13 mm a 1 in.

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 ncma tek 7 1c table 1 fire resistance rating period of concrete masonry assemblies refs. Some of the above listed shapes are non stock items. Fire barrier walls are typically constructed of drywall or gypsum board partitions with wood or metal framed studs.

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

Table 1 required fire wall fire resistance ratings ref. These wall assembly files are used for planning and estimation purposes for many ul wall types such as fire rated wall assemblies. 51 mm thickness can be used. The fire resistance rating of concrete masonry walls depends on the type of aggregate used in the units.

Concrete masonry noncombustible constructionis a. 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.