Usg provides resources here for our ul wall assemblies for seamless integration into any construction project.
Ul number for 2 hour wall concrete block.
The fire resistance rating of concrete masonry walls depends on the type of aggregate used in the units.
For example for an 8 in.
Head of wall firestop system firestop sealant.
Concrete or block wall to concrete over fluted metal deck top of wall max.
For the least fire resistant cast in place concrete that is concrete made with siliceous or what they call group ii aggregates the rating is 4 hours for a cast in place wall 7 1 2 inches thick.
Find an appropriate firestop system by searching with the system number or by inputting the application characteristics into the filters.
A 5 1 2 inch wall gets a rating of 2 hours.
203 mm limestone aggregate concrete masonry wall with a maximum control joint width of in.
These wall assembly files are used for planning and estimation purposes for many ul wall types such as fire rated wall assemblies.
Linear interpolation from table 721 3 2 of the florida building code for exposed finish block mix 55 limestone 45 siliceous aggregates.
Ul design u411 v438.
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.
Ss 211 2 hour partition to steel deck.
Table 1 required fire wall fire resistance ratings ref.
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 blocks while allowing for safe means of egress and fire rating should no longer be looked at as just normal grey cmu.
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.
B for group h 1 h 2 or continue reading detailing concrete masonry fire walls.
Ss 210 2 hour partition to concrete slab.
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.
51 mm thickness can be used.
