How Thick Is A Concrete Roof Slab

Design the roof slab beam and column of house given in figure 1.

How thick is a concrete roof slab.

These will support the concrete patio slab and will need to be a quarter of the depth of your slab. Slabs s1 and s2 to be designed. Search is the most efficient way to navigate the engineering toolbox. 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.

Recommended thickness of concrete slabs engineering toolbox resources tools and basic information for engineering and design of technical applications. To install such a roof a crew first builds a framework for the intended roof. Step 3 placing the steel joists. Live load 40 psf figure 1.

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. When working out the proper thickness of the slab you should take the appropriate size of any joints into consideration. Light use for one to two light cars or trucks you can generally get away with pouring less concrete. For example a 4 inch patio slab will have a 1 inch concrete joint.

For a 6 inch slab r value would be between 0 6 and 1 2. Concrete compressive strength fc 3 ksi. For small cars the concrete should be at least four inches thick. Steel yield strength fy 40 ksi.

Exact specifications vary but most concrete roofs are several inches thick. 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. How thick you pour your concrete floor can be determined by how the floor is going to be used.

The blocks come in several sizes but this guide will assume you are using a 16 3 4 inch wide concrete slab. For example the florida based company hurricane proof systems offers a 7 inch 18 centimeter slab of concrete in three layers. 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. Generally speaking lower density concrete provides better insulation than higher density concrete.