Sloped Concrete Roof Slab

A system for building sloped concrete roofs.

Sloped concrete roof slab.

For a mild slope such as the 1 in 20 slope required for a wheelchair ramp a 3 in. For example the florida based company hurricane proof systems offers a 7 inch 18 centimeter slab of concrete in three layers. The important part is to have the top of the slab at door openings be at the 3 3 4 of exposed skirt board left. Aci 117 90 st andard specifications for tolerances for concrete construction and materials gives a level alignment tolerance of 3 4 inch for top of slab elevation of slabs on grade.

Feb 12 2018 the reinforcement detail of a sloped concrete roof that is supported by a beam. The general consensus is the minimum slope should be 1 8 per foot. Embedded 3 4 inch into the roof slab after concreting these channels retain the insulation and serve as attachment points for interior ceiling finishes. For steeper slopes you will have to go to a 1 in.

A concrete roof is exactly what it sounds like. A network of metal or plastic channels placed along the edges of the insulation board projects above it to support the roof. Feb 12 2018 the reinforcement detail of a sloped concrete roof that is supported by a beam. A sloped concrete roof is much more complicated king confirms.

However the code does not specifically give an amount of slope. Exact specifications vary but most concrete roofs are several inches thick. Hips and valleys have to be engineered and a lot of it is using experience and professional judgment on the hoffman home king spec ed a steel i beam at the ridge line with the lite deck running perpendicular to the ridge. A 2 slope will probably ensure better drainage we could also find no slope tolerance for use when a floor slope is specified.

From a structural standpoint low slump concrete is good. A solid slab of concrete capping the top of your house. This would work out to exactly the 4 5 inches in 36 feet which you had guesstimated.