Roof Slab Thickness For 2 Story House

Section a a see figure 1 above.

Roof slab thickness for 2 story house.

A concrete roof is exactly what it sounds like. The rest of the slab is 4 or 6 inches thick. 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. Lb la 24 75 8 3 09 2 one way slab assume 5 slab.

Span length for end span according to aci 8 7 is minimum of. Around the edge of the slab the concrete forms a beam that is perhaps 2 feet deep. I maintain a concrete cover of 40 mm. A 4 or 6 inch layer of gravel lies beneath the slab.

A 4 millimeter sheet of plastic lies between the concrete and the gravel to keep moisture out. Minimum rcc beam size should not be less than 9 x 9 225mm x 225mm with an additional slab thickness of 125 mm. Exact specifications vary but most concrete roofs are several inches thick. Influential architects working in the early 1900s such as walter gropius and le corbusier saw ornamentation and traditional styles of architecture as.

It should come as no wonder then that these are experiencing a serious comeback right now. 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. The same floor if framed with 2 by 12s will be 13 1 4 inches thick. 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.

For example a slab that is 6 inches thick might have rebar marked as size 6 or 3 4 inch. In such applications using size 3 and 4 rebar is common. Therefore l 8 42 slab thickness hf l 20 0 4 fy 100000 for fy 60000 psi. Roof and wall sheathing gravity and wind loads floor diaphragms and shear walls in plane lateral overturninand g loads 6 notes.

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. For example the florida based company hurricane proof systems offers a 7 inch 18 centimeter slab of concrete in three layers. 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. Ask any architect and they ll tell you that hardly any other type of architecture is as timeless and modern as that of flat roof houses.

Roof rafters trusses and beams. A solid slab of concrete capping the top of your house.