2 Hr Fire Rated Cmu Wall

Use steel studs and two layers of 1 2 inch type c drywall on each side of the studs for a two hour fire rating on an interior wall.

2 hr fire rated cmu wall.

Mount a 1 1 2 inch fiberglass barrier inside the studs. B for group h 1 h 2 or continue reading detailing concrete masonry fire walls. 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. 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.

Structural function or both. These blocks while allowing for safe means of egress and fire rating should no longer be looked at as just normal grey cmu. The fire resistance rating of concrete masonry walls depends on the type of aggregate used in the units. 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 endurance of structures figure 5 shows the effect of fire on the resistance of a simply supported reinforced concrete. 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. Fire resistance rating of cmu finish table 721 3 2. 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.

A wall tested according to e 119 undergoes both fire exposure and water hose stream testing. Use special fiberglass rated for use in firewalls. 2 3 governs materials and assemblies used for structural fire resistance and fire rated separation of. Chapter 7 of the international building code ibc refs.

The hose stream test provides a meaningful measure of. Fire resistancerated wall assembliesare commonly evaluated using astm standard e 119 ref. Accepts no responsibility for proper application of the rated wall assembly above or responsibility for the construction of such assemblies. 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. These wall assembly files are used for planning and estimation purposes for many ul wall types such as fire rated wall assemblies. Table 1 required fire wall fire resistance ratings ref.