Linear interpolation from table 721 3 2 of the florida building code for exposed finish block mix 55 limestone 45 siliceous aggregates.
Ul number for 2 hour wall concrete block.
25 mm thickness measured perpendicular to the face of the wall of ceramic fiber in the joint can be used in walls with fire resistance ratings up to 3 hours while a 2 in.
Concrete or block wall to concrete over fluted metal deck top of wall max.
Ss 210 2 hour partition to concrete slab.
B for group h 1 h 2 or continue reading detailing concrete masonry fire walls.
Find an appropriate firestop system by searching with the system number or by inputting the application characteristics into the filters.
Usg provides resources here for our ul wall assemblies for seamless integration into any construction project.
Head of wall firestop system firestop sealant.
A 5 1 2 inch wall gets a rating of 2 hours.
The fire resistance rating of concrete masonry walls depends on the type of aggregate used in the units.
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.
13 mm a 1 in.
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.
These blocks while allowing for safe means of egress and fire rating should no longer be looked at as just normal grey cmu.
For example for an 8 in.
Head of wall firestop system proform quick set fs 90 compound 1 side ul design u411 v438.
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.
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.
Ul design u411 v438.
203 mm limestone aggregate concrete masonry wall with a maximum control joint width of in.
Ss 211 2 hour partition to steel deck.
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.
