Reinforced Concrete Roof Slab Thickness

Reinforced concrete slabs are heavier and generate higher seismic forces in an event.

Reinforced concrete roof slab thickness.

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. 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 in many domestic and industrial buildings a thick concrete slab supported on. Such slabs left unconnected to walls caused many deaths in the 2005 quake from school roof collapses.

The diameter of bar generally used in slabs are. Minimum reinforcement is 0 12 for hysd bars and 0 15 for mild steel bars. For example the florida based company hurricane proof systems offers a 7 inch 18 centimeter slab of concrete in three layers. A concrete slab is a common structural element of modern buildings consisting of a flat horizontal surface made of cast concrete.

Minimum thickness of concrete slab beam column foundation and other structural members is selected to meet the design requirements as per standard codes. Exact specifications vary but most concrete roofs are several inches thick. Thickness of the slab is decided based on span to depth ratio specified in is456 2000. The thickness of concrete is an important factor in load bearing strength but to conserve resources and avoid over building other factors are also taken into consideration.

Slab reinforcement cantilever reinforcement slab thickness roof apex reinforcement example of a 1. 6 mm 8 mm 10 mm 12mm and 16mm. Design process includes proper assumption of structural element sizes and then check hellip. Plan view of a reinforced concrete pitched inclined slab.

Minimum thickness of concrete structural elements based on aci 318 14 irc 2009 is 456 2000 and ubc 1997 is presented. If reinforced concrete were to be reused strong connections would have to be made between roof and walls. A concrete roof is exactly what it sounds like.