3 Hour Fire Rated Concrete Wall

Table 1 required fire wall fire resistance ratings ref.

3 hour fire rated concrete wall.

A 5 1 2 inch wall gets a rating of 2 hours. 3 hour area separation wall. 25 4 mm shaftliner panels friction fit between 2 in. Minimum slab thickness inches for fire resistance rating of 1 hour 1 5 hour 2 hour 3 hour 4 hour siliceous 3 5 4 3 5 0 6 2 7 0 carbonate 3 2 4 0 4 6 5 7 6 6 sand lightweight 2 7 3 3 3 8 4 6 5 4 lightweight 2 5 3 1 3 6 4 4 5 1 reinforced concrete also must meet cover protection requirements to maintain structural fire resistance.

Fire endurance of structures figure 5 shows the effect of fire on the resistance of a simply supported reinforced concrete. 8 x 8 x 18 nominal. 51 mm thickness can be used in the joints of a 4 hour wall. 203 mm limestone aggregate concrete masonry wall with a maximum control joint width of in.

Portland cement stucco 5 8 thick both sides applied directly to c m u. Application of the information in tables 1 and 2 results in the listing of concrete masonry wall fire ratings in table 3. 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. Preferred product 910720 c m u.

B for group h 1 h 2 or continue reading detailing concrete masonry fire walls. Where the required frl does not include a value for structural adequacy e g 60 30 the wall must have a frl for structural adequacy equal to that required for integrity i e to achieve a frl of 60 30 the wall must be designed for 60 60 30. 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. The 3 hour area separation wall system is a 3 hour fire wall consisting of two layers of 1 in.

If the aggregateblendis changed to70 30 producea denser architectural unit the fire rating is decreased to three hours. Refer to table a. 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. If the foam plastic thickness is not smaller than 25 mm r n 0 59 in equation 6 is equal to 0 22.

For example for an 8 in. 50 8 mm light gauge steel h studs and a layer of 5 8 fire shield c gypsum board fastened to each side of the studs. Structural function or both. 13 mm a 1 in.