Concrete Roof Slab Details

Step 3 placing the steel joists.

Concrete roof slab details.

Learn more and see projects with hollowcore slabs. A concrete roof is exactly what it sounds like. The blocks come in several sizes but this guide will assume you are using a 16 3 4 inch wide concrete slab. Spancrete hollowcore precast concrete planks slabs are fire resistant reduce weight and costs.

A solid slab of concrete capping the top of your house. Waffle slab is a reinforced concrete roof or floor containing square grids with deep sides and it is also called as grid slabs. Concrete slabs can take many forms including prestressed precast and cast in place construction. This kind of slab is majorly used at the entrance of hotels malls restaurants for good pictorial view and to install artificial lighting.

One concern is that the concrete must develop the compressive strength intended by the structural engineer in the design of the roof deck. For example the florida based company hurricane proof systems offers a 7 inch 18 centimeter slab of concrete in three layers. Reinforced concrete for frames and roof slabs both cast in place and precast panels but only if connected to walls local stone masonry is very strong in transferring loads to footings. In one way slab main reinforcement is parallel to shorter direction and the reinforcement parallel to longer direction is called distribution steel.

The slabs having ratio of longer length to its shorter length l y l x greater than 2 is called one way slab otherwise as two way slab. Exact specifications vary but most concrete roofs are several inches thick. 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. In two way slab main reinforcement is provided along both direction.

Depending upon the size and number of stories associated with a given project one concrete framing system may have unique benefits over another. If properly constructed the footings are seismic resistant and have been known to last for centuries.