Thick Deep Mat Slab Foundation

Plate thickened under columns.
Thick deep mat slab foundation. A slab foundation is a large thick slab of concrete that is typically 4 6 thick in the center and poured directly on the ground all at one time. If the cost of a deep foundation pile foundation is higher than the raft foundation we use to make the structure economical. A mat foundation is used when the subsoil is weak and column loads are so heavy that the conventional spread footings cover more than 50 of the building area. Many foundations utilize post tension cables while others are reinforced with.
A slab foundation is made of concrete that is typically 4 6 thick in the center. When a spread footing columns can cover up to 50 of the foundation area. There are following types of mat foundation flat plate raft. Two way slab and beam.
A raft foundation is often used when the soil is weak as it distributes the weight of the building over the entire area of the building and not over smaller zones like individual footings or at individual points like pile foundations this reduces the stress on the soil. The edges of the slab are thicker as wide as 24 in order to allow for extra strength around the perimeter. The concrete slab is often placed on a layer of sand for drainage or to act as a cushion. It is common to use mat foundation or deep basements to transfer the column loads to the underlying soil as well as provide floor slab for the basement.
Houses built on a.