How Thick Is A Concrete Roof Slab

The construction of the original building consisted of a reinforced concrete frame with cast in situ trough floors.

How thick is a concrete roof slab.

For example the florida based company hurricane proof systems offers a 7 inch 18 centimeter slab of concrete in three layers. The steel joists will provide a strong foundation for the flat concrete roofing. Light use for one to two light cars or trucks you can generally get away with pouring less concrete. Live load 40 psf figure 1.

When working out the proper thickness of the slab you should take the appropriate size of any joints into consideration. Recommended thickness of concrete slabs engineering toolbox resources tools and basic information for engineering and design of technical applications. Generally speaking lower density concrete provides better insulation than higher density concrete. One of the most crucial step in building a flat concrete roof is to figure out the size of the concrete block you will need.

Exact specifications vary but most concrete roofs are several inches thick. For a 6 inch slab r value would be between 0 6 and 1 2. Concrete compressive strength fc 3 ksi. Steel yield strength fy 40 ksi.

A reasonable r value for a normal concrete slab can be estimated using an r value the thermal resistance per inch of thickness between 0 1 and 0 2 and multiplying it times the slab thickness. Step 3 placing the steel joists. For example a 4 inch patio slab will have a 1 inch concrete joint. 2 thick brick tile.

An extra floor was required to be constructed which involved converting the original roof slab to a floor slab thereby increasing the live load capacity to 3 kn m 2. Search is the most efficient way to navigate the engineering toolbox. Design the roof slab beam and column of house given in figure 1. The blocks come in several sizes but this guide will assume you are using a 16 3 4 inch wide concrete slab.

These will support the concrete patio slab and will need to be a quarter of the depth of your slab. For small cars the concrete should be at least four inches thick. This is largely based on the types and the number of vehicles you plan to park on it. Slabs s1 and s2 to be designed.