Reinforced Concrete Roof Thickness

It is recommended that minimum 90 mil 2 3 mm thick reinforced butyl rubber membranes be used for green roof assemblies.

Reinforced concrete roof thickness.

Sheets normally are 60 mils 90 mils or 120 mils 1 5 mm 2 3 mm or 3 0 mm thick. For example we build residential in flat plate concrete which will typically have a column spacing of 20 oc and a slab thickness of 8 typ. The reinforcement is usually though not necessarily steel reinforcing bars and is usually embedded passively in the concrete before the. This is one of the common causes of flat roof waterproofing failure.

In general a minimum fall of 1 in 80 will help to prevent ponding of water. A concrete roof is exactly what it sounds like. Reinforced concrete rc also called reinforced cement concrete or rcc is a composite material in which concrete s relatively low tensile strength and ductility are counteracted by the inclusion of reinforcement having higher tensile strength or ductility. For example the florida based company hurricane proof systems offers a 7 inch 18 centimeter slab of concrete in three layers.

Such slabs left unconnected to walls caused many deaths in the 2005 quake from school roof collapses. Exact specifications vary but most concrete roofs are several inches thick. The intensity of a tornado is an act of nature that is not amenable to being controlled by human measures. Would cause a breakdown on the roof surface.

It has the properties that it will creep deformation with long term load and shrink a result of. Concrete thickness 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. Ubc recommends minimum thickness of concrete floor slabs supported directly on the ground to be 89mm whereas bcgbc4010a apply structural principles to residential low rise constructions determined minimum thickness to be 100mm. A solid slab of concrete capping the top of your house.

Reinforced concrete slabs are heavier and generate higher seismic forces in an event. If reinforced concrete were to be reused strong connections would have to be made between roof and walls. During construction precautions must be taken to prevent excessive moisture from being trapped between the reinforced concrete roof structure and membrane. So the recommended criteria for the minimum quality of the concrete to be used in an exposed concrete.

Commercial is typically steel w a composite deck so you ll have a 5 6 slab sitting on top of steel beams. Slab on ground 1 4 minimum thickness of diaphragms.