Slab Depth For Concrete Floor

Concrete slab on grade thickness analysis.

Slab depth for concrete floor. This calculator is to be used as an estimating tool only. Medium loads if the garage is used for average sized vehicles and or medium to heavy trucks the concrete needs to be six inches thick. Standard concrete floor slab thickness in residential construction is 4 inches. The half and half ratio makes it considerably easier to work out the correct ratio of your concrete.

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. 1 3 minimum thickness of slab on the ground 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. Enter chart with slab stress 2. Five to six inches is recommended if the concrete will receive occasional heavy loads such as motor homes or garbage trucks.

It is also considered acceptable to have a patio slab consisting of 50 percent concrete and 50 percent gravel base. Depending upon the type load coming upon the slab the thickness is varied. The base under a slab is often more important than the depth of the slab itself. Concrete shed foundations vary in thickness depending on the size and weight.

To prepare the base cut the ground level to the proper depth to allow for the slab thickness. Once i ve covered the entire area i can average the numbers together to get a final reading. Good base is important. Typical thickness of a concrete slab for a shed size soil and use affect slab thickness.

Light loads for one to two light cars or trucks the concrete should be at least four inches thick. Once i ve determined the average grade of the dirt i can set the finish concrete floor grade up 4 5 or 6 inches from that depending on how thick i want my concrete floor. Slab on ground 1 4 minimum thickness of diaphragms. For slab subjected to concentrated post loading for k 100 pci per pca slab thickness design for industrial concrete floors on grade figure 7b page 10 instructions for use of figure 7b.

The method used for retrofitting a polished concrete floor is either to a cut or sand the existing floor slab to be hardened and polished or b apply a topping slab of polished concrete flooring at least 50 mm thick over the existing slab.