Concrete Slab Flat Roof Detail

Step 3 placing the steel joists.

Concrete slab flat roof detail.

Concrete slab flat roofs. Oct 4 2017 flat concrete roof construction details detail drawings. For determining moments shears and reactions of such slabs. The basis for this simple but effective solution is natural air pressure.

The steel joists will provide a strong foundation for the flat concrete roofing. Because typical concrete is porous it needs to be treated with an additive such as xypex which makes the concrete waterproof. As the width of the concrete slab is 16 3 4 inches place the steel joists at this distance. What is a slab.

The definition of a flat roof according to bs 6229 is having a pitch less than 10 o to the horizontal however some in the industry would consider up to 15 o as their definition of a flat roof. The roof should incorporate insulation and usually a vapour control layer to protect from interstitial condensation. A concrete roof is exactly what it sounds like. A solid slab of concrete capping the top of your house.

The simplest way to construct a roof terrace is by utilising a concrete slab. When building a flat roof it is vital that a degree of falls is built into the construction to ensure rainwater run off. Slabs are constructed to provide flat surfaces usually horizontal in building floors roofs bridges and other types of structures the slab may be supported by walls or by reinforced concrete beams usually cast monolithically with the slab or by structural steel beams or by columns or by the ground. Exact specifications vary but most concrete roofs are several inches thick.

Hollow core concrete slabs paroc air is a simple and safe solution for making dry flat roofs. Even though a treated concrete slab is waterproof standing water on a roof terrace should be avoided and so all roof terrace slabs should. For example the florida based company hurricane proof systems offers a 7 inch 18 centimeter slab of concrete in three layers. According to the 1995 aci code all two way reinforced concrete slab systems including edge supported slabs flat slabs and flat plates are to be analyzed and designed according to one unified method such as direct design method and equivalent frame method.

Others would treat even steeper pitches as flat roofs. A concrete slab flat roof is normally made up of a structural layer of concrete finished with a smooth screed onto which a water proof layer such as a membrane is laid.