Concrete Roof Slab Details

In one way slab main reinforcement is parallel to shorter direction and the reinforcement parallel to longer direction is called distribution steel.

Concrete roof slab details.

One concern is that the concrete must develop the compressive strength intended by the structural engineer in the design of the roof deck. Exact specifications vary but most concrete roofs are several inches thick. For example the florida based company hurricane proof systems offers a 7 inch 18 centimeter slab of concrete in three layers. This kind of slab is majorly used at the entrance of hotels malls restaurants for good pictorial view and to install artificial lighting.

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. Learn more and see projects with hollowcore slabs. One of the most crucial step in building a flat concrete roof is to figure out the size of the concrete block you will need. The steel joists will provide a strong foundation for the flat concrete roofing.

If properly constructed the footings are seismic resistant and have been known to last for centuries. 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. The blocks come in several sizes but this guide will assume you are using a 16 3 4 inch wide concrete slab.

In two way slab main reinforcement is provided along both direction. 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. 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. Constructing a concrete slab for a structural roof is different from that for building a slab on the ground in that attention must concern two important objectives.

Depending upon the size and number of stories associated with a given project one concrete framing system may have unique benefits over another. Spancrete hollowcore precast concrete planks slabs are fire resistant reduce weight and costs.