Hollow Concrete Block Wall Fire Rating

203 mm limestone aggregate concrete masonry wall with a maximum control joint width of in.

Hollow concrete block wall fire rating. Single wythe concrete masonry wall. Equivalent thickness in for standard concrete block widths 1cores can be filled with grout loose fill insulation or aggregate meeting astm c 33 ref. The figures are in accordance with bs 5628 3 and bs en 1996 1 2. 4 hour rating requires a 6 deep lightweight unit 4 hour rating requires an 8 deep normal weight unit.

If you fill all the cells. Thomas armstrong concrete blocks limited www thomasarmstrong co uk the following tables show the nominal fire resistance periods for our various block types. Table 1 fire resistance rating period of concrete masonry assemblies refs. Where the required frl does not include a value for structural adequacy e g 60 30 clause 7 5 of as 3700 requires.

Concrete masonry fire resistance. The fire resistant rating of masonry walls namely. 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. 4 or c 331 ref.

1 0 fire 03 1 1 design of walls for fire resistance 03 1 2 general design construction considerations 06 1 3 frl for integrity and insulation 07 1 4 frl for structural adequacy for un reinforced and reinforced masonry 08 2 0 sound 22 2 1 the ncc bca requirements 22 2 2 design of walls for sound insulation 22. Single wythe walls multi wythe walls and wall with surface treatments depend on the influence of grouting and the effect of filling the cores of hollow units with fill materials. 51 mm thickness can be used in the joints of a 4 hour wall. Concrete masonry noncombustible constructionis a.

Standard northwest block wall ratings. For example for an 8 in. Tests have been performed to determine the fire resistance of load bearing and non loadbearing walls of concrete blocks both solid and hollow made with two types of aggregate. Block mm loadbearing wall non loadbearing wall.

1 2 3 aggregate type in the minimum required equivalent thickness in. Austral bricks technical manual 1 fire and sound resistance of block masonry page 4 of 14 design of besser wall system for fire step 1 establish requirements establish the required fire resistance level frl for the wall. 13 mm a 1 in. 1 hour rating requires a 6 deep block 2 hour rating requires a 10 deep block if you need to achieve a 4 hour fire rating you can either use a 12 deep lightweight block or you can fill all the core holes with sand grout or perlite.