Reinforced Concrete Roof Thickness

This is one of the common causes of flat roof waterproofing failure.

Reinforced concrete roof thickness.

For example the florida based company hurricane proof systems offers a 7 inch 18 centimeter slab of concrete in three layers. So the recommended criteria for the minimum quality of the concrete to be used in an exposed concrete. 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. 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.

During construction precautions must be taken to prevent excessive moisture from being trapped between the reinforced concrete roof structure and membrane. Commercial is typically steel w a composite deck so you ll have a 5 6 slab sitting on top of steel beams. Such slabs left unconnected to walls caused many deaths in the 2005 quake from school roof collapses. Concurrently the roof for a house is not a particularly large or costly element of the total cost of a house.

Sheets normally are 60 mils 90 mils or 120 mils 1 5 mm 2 3 mm or 3 0 mm thick. Arch 631 note set 10 1 f2013abn 3 reinforced concrete is a composite material and the average density is considered to be 150 lb ft3. Reinforced concrete slabs are heavier and generate higher seismic forces in an event. 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 is recommended that minimum 90 mil 2 3 mm thick reinforced butyl rubber membranes be used for green roof assemblies. If reinforced concrete were to be reused strong connections would have to be made between roof and walls. 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.

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

With that in mind i ve seen slabs as thick as 16 18 due to column spacing. The reinforcement is usually though not necessarily steel reinforcing bars and is usually embedded passively in the concrete before the.