Roof Slab Thickness For 2 Story House

Exact specifications vary but most concrete roofs are several inches thick.

Roof slab thickness for 2 story house.

Span length for end span according to aci 8 7 is minimum of. A 4 or 6 inch layer of gravel lies beneath the slab. When accounting for joist width subflooring flooring and standard ceiling drywall a floor framed with 2 by 10s will be very close to 11 1 4 inches thick. It should come as no wonder then that these are experiencing a serious comeback right now.

I l ln hf 8 5 12 8 42 ii c c distance between supports 9 0625 figure 2. Section a a see figure 1 above. I generally use a minimum of 4 bars with 2 bars of 12 mm thickness in the bottom of the beam and 2 bars of 10 mm at the top of the beam. A solid slab of concrete capping the top of your house.

I maintain a concrete cover of 40 mm. Regardless of how new or modern a house is there is a good chance that it will be topped off with a flat roof now but if you can t picture how great they look we. The same floor if framed with 2 by 12s will be 13 1 4 inches thick. For example a slab that is 6 inches thick might have rebar marked as size 6 or 3 4 inch.

Slabs for septic tanks may require the use of both welded wire fabric and rebar. Therefore l 8 42 slab thickness hf l 20 0 4 fy 100000 for fy 60000 psi. For example the florida based company hurricane proof systems offers a 7 inch 18 centimeter slab of concrete in three layers. Lb la 24 75 8 3 09 2 one way slab assume 5 slab.

The rest of the slab is 4 or 6 inches thick. Contractors sometimes use the 1 8 rule meaning the size of the rebar is 1 8 the thickness of the slab. Roof and wall sheathing gravity and wind loads floor diaphragms and shear walls in plane lateral overturninand g loads 6 notes. Roof rafters trusses and beams.

Minimum rcc beam size should not be less than 9 x 9 225mm x 225mm with an additional slab thickness of 125 mm. A concrete roof is exactly what it sounds like. Although there are certainly many times and places throughout the history of architecture where flat roofs have been used the flat roof has been intrinsically tied with modern architecture since it emerged from the modernist style in the 1920s. A 4 millimeter sheet of plastic lies between the concrete and the gravel to keep moisture out.

Asd load combinations d h d h l2 0 3 l r s d h lr or s 0 3l 2 d l2 0 3 l r or s d lr or s 0 3 l 2 same as immediately above plus d w d 0 7e 0. In such applications using size 3 and 4 rebar is common.