2 Hr Fire Rated Concrete 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.

2 hr fire rated concrete wall.

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. C roof ceilings45 51 steel framed including steel bar joist framing. 2 3 governs materials and assemblies used for structural fire resistance and fire rated separation of. Usg provides resources here for our ul wall assemblies for seamless integration into any construction project.

The ratings relate to fire tests designed to determine how quickly. Accepts no responsibility for proper application of the rated wall assembly above or responsibility for the construction of such assemblies. For a wall having no finish on one side or different types or thicknesses of finish on each side the calculation procedures of sections 722 2 1 4 1 and 722 2 1 4 2 shall be performed twice assuming either side of the wall to be the fire exposed side. Fire endurance of structures figure 5 shows the effect of fire on the resistance of a simply supported reinforced concrete.

Influence of fire on concrete structure. The fire resistance rating of concrete masonry walls depends on the type of aggregate used in the units. The fire resistance rating of reinforced and plain concrete walls floors and roofs depend on equivalent thickness of the element and can be found out using table 3. Hr hour ht height insul insulating or insulation int interior.

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. Structural function or both. To confine and isolate fire within a zone comprised of fire resistance rated walls ceiling and floor assemblies. 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.

In the high rise hospital the columns might need a four hour rating whereas in the single story building exterior walls may need only a one hour rating. The fire resistance rating of the wall shall not exceed the lower of the two values. Chapter 7 of the international building code ibc refs. These blocks while allowing for safe means of egress and fire rating should no longer be looked at as just normal grey cmu.