Reinforced Concrete Roof Slab Thickness

Methods used for finding slab thickness varies for different types of slabs.

Reinforced concrete roof slab thickness.

Plan view of a reinforced concrete pitched inclined slab. Minimum reinforcement is 0 12 for hysd bars and 0 15 for mild steel bars. Such slabs left unconnected to walls caused many deaths in the 2005 quake from school roof collapses. Reinforced concrete slabs are heavier and generate higher seismic forces in an event.

A concrete slab is a common structural element of modern buildings consisting of a flat horizontal surface made of cast concrete. Steel reinforced slabs typically between 100 and 500 mm thick are most often used to construct floors and ceilings while thinner mud slabs may be used for exterior paving see below. For flatwork such as slabs on grade and driveways a minimum thickness of four inches is required but increasing the thickness to five inches can add nearly 50 percent to the load bearing capacity. The diameter of bar generally used in slabs are.

Slab reinforcement cantilever reinforcement slab thickness roof apex reinforcement example of a 1. If reinforced concrete were to be reused strong connections would have to be made between roof and walls. In general 6 inch 150mm slab thickness is considered for residential and commercial buildings with reinforcement details as per design. The maximum diameter of bar used in slab should not exceed 1 8 of the total thickness of slab.

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. For determining moments shears and reactions of such slabs. For example the florida based company hurricane proof systems offers a 7 inch 18 centimeter slab of concrete in three layers. Thickening the structure along the perimeter by another will serve as an integral footing adding strength where the loads are heaviest.

A concrete roof is exactly what it sounds like. A solid slab of concrete capping the top of your house. Exact specifications vary but most concrete roofs are several inches thick.