Suspended Concrete Floor Slab Thickness

Upper floor concrete slabs workers place concrete on a precast floor slab.

Suspended concrete floor slab thickness. For slab on ground floors it provides an understanding of the footing slab selection design detailing and construction requirements contained in as 2870 and. A concrete slab is a common structural element of modern buildings consisting of a flat horizontal surface made of cast concrete. For slabs 12 in. According to south african estimators the square meter pricing for a suspended first.

Suspended concrete slab is referred to a cement slab that is not in contact with the ground. Forterra will provide the trucks for hauling and the crane for installation of the precast garage floor suspended concrete slabs. Aci 117 90 standard specifications for tolerances for concrete construction and materials gives only two tolerances for these appli cations. Bearing pad is supplied by forterra structural specialty products and placed on the bearing foundation walls.

Whichever construction method is used it is usual to leave concrete surfaces quite rough to provide a key for the cement sand screed. Concrete mixes are designed to a specified compressive strength expressed as pounds per square inch psi. Tolerances for the floors placed on these suspended systems are often misun derstood. Concrete has inherent compressive strength resistance to forces pushing on it.

Traditionally column spacings and floor spans in these buildings have been in the range of 6 to 9 metres to both contain costs and simplify construction. This type of concrete slab construction requires different concrete slab design from the one we normally see that is cast on the ground. Concrete for household works such as driveways or floors is typically in the range of 1 800 psi to 4 000 psi for compressive strength. The most common application of suspended slab in residential construction is used at garage floor where below the garage floor is a storage.

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. Concrete slab on ground floor systems and suspended floors suitable for residential buildings ranging from single detached houses to medium density buildings of apartments and flats. When renovating rooms with timber floors it is often possible to replace the timber with a concrete slab for added thermal mass and quietness underfoot. The normal thickness used for reinforced concrete slabs in south africa is 170 mm for small slabs 255 mm for slabs larger than 5m x 5m and 340 mm thick for long span slabs forming part of a beam and carrying heavier loads.

It is also possible to construct suspended concrete floors by using a precast product for example the popular beam and block system.