If the cost of a deep foundation pile foundation is higher than the raft foundation we use to make the structure economical.
Thick deep mat slab foundation.
Types of mat raft foundation.
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.
Two way slab and beam.
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.
A shallow foundation is a type of building foundation that transfers building loads to the earth very near to the surface rather than to a subsurface layer or a range of depths as does a deep foundation shallow foundations include spread footing foundations mat slab foundations slab on grade foundations pad foundations rubble trench foundations and earthbag foundations.
There are following types of mat foundation flat plate raft.
When a spread footing columns can cover up to 50 of the foundation area.
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.
Plate thickened under columns.
Many foundations utilize post tension cables while others are reinforced with.
The edges of the slab are thicker as wide as 24 in order to allow for extra strength around the perimeter.
The concept of stress is very basic to civil engineering.
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.