Fire resistance rating of cmu finish table 721 3 2.
2 hr fire rated cmu wall.
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.
Expanded slag or pumice 4 7 4 5 4 4 4 2 4 0 3 8 3 6 3 4 3 2 3 0 2 7 2 5 2 1 1 9 1 5 a fire resistance rating between the hourly fi re resistance rating periods listed may be determined by linear in terpolation based on the equivalent thickness value of the concrete masonry unit.
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.
The standard is used to hourly fire rating and to indicate wall s its durability during a fire.
2 3 governs materials and assemblies used for structural fire resistance and fire rated separation of.
Use special fiberglass rated for use in firewalls.
The hose stream test provides a meaningful measure of.
Structural function or both.
2 hour fire rating.
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.
Fire endurance of structures figure 5 shows the effect of fire on the resistance of a simply supported reinforced concrete.
B for group h 1 h 2 or continue reading detailing concrete masonry fire walls.
The american society for testing and materials and underwriters laboratory both have specifications for.
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.
These wall assembly files are used for planning and estimation purposes for many ul wall types such as fire rated wall assemblies.
Mount a 1 1 2 inch fiberglass barrier inside the studs.
Chapter 7 of the international building code ibc refs.
Concrete masonry is widely specified for fire walls and fire barriers because concrete masonry is noncombustible provides durable fire resistance and is economical to construct.
These blocks while allowing for safe means of egress and fire rating should no longer be looked at as just normal grey cmu.
Fire resistance rating or fire rating is defined as the duration of time that an assembly roof floor beam wall or column can endure a standard fire as defined in astm e 119 3.
A wall tested according to e 119 undergoes both fire exposure and water hose stream testing.
Accepts no responsibility for proper application of the rated wall assembly above or responsibility for the construction of such assemblies.
