This slab lies below the actual slab and above the door sill level.
Construction concrete slab roof detail.
Concrete weighs a lot and the outside walls have to be capable of supporting the giant slab.
These types of concrete slabs are used in houses.
Even though a treated concrete slab is waterproof standing water on a roof terrace should be avoided and so all roof terrace slabs should.
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The slab which provided above the door for storage purpose is called low roof slab.
For this reason adding a concrete roof onto a wood.
As the width of the concrete slab is 16 3 4 inches place the steel joists at this distance.
The steel joists will provide a strong foundation for the flat concrete roofing.
This type of slab is closed at all ends and open at one end.
Of course a concrete roof requires more support than a typical wooden roof.
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Oct 4 2017 flat concrete roof construction details detail drawings.
Because typical concrete is porous it needs to be treated with an additive such as xypex which makes the concrete waterproof.
The blocks come in several sizes but this guide will assume you are using a 16 3 4 inch wide concrete slab.
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