2 Hr Fire Rated Cmu Wall

2 3 governs materials and assemblies used for structural fire resistance and fire rated separation of.

2 hr fire rated cmu wall. 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. Accepts no responsibility for proper application of the rated wall assembly above or responsibility for the construction of such assemblies. These wall assembly files are used for planning and estimation purposes for many ul wall types such as fire rated wall assemblies. Structural function or both.

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. 2 hour fire rating. The hose stream test provides a meaningful measure of. The fire resistance rating of concrete masonry walls depends on the type of aggregate used in the units.

Fire resistancerated wall assembliesare commonly evaluated using astm standard e 119 ref. B for group h 1 h 2 or continue reading detailing concrete masonry fire walls. A wall tested according to e 119 undergoes both fire exposure and water hose stream testing. 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.

Table 1 required fire wall fire resistance ratings ref. 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. The american society for testing and materials and underwriters laboratory both have specifications for. Chapter 7 of the international building code ibc refs.

Mount a 1 1 2 inch fiberglass barrier inside the studs. Use special fiberglass rated for use in firewalls. 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. 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.

These blocks while allowing for safe means of egress and fire rating should no longer be looked at as just normal grey cmu. 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. The standard is used to hourly fire rating and to indicate wall s its durability during a fire.