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.
Mat foundation construction process.
Raft foundation is also known as mat foundation.
The raft foundation is a very commonly used type of foundation system.
Definition of raft foundation along with working principle when to choose raft types of raft foundation materials of raft foundation raft construction steps etc are discussed below.
Los angeles building department engineer and contractor observations on the successful oceanwide plaza concrete schedule will influence mat foundation slab shear wall and column construction for reinforced concrete high rise buildings soon to break ground throughout downtown.
Raft mat foundation is used in those places where we have less bearing capacity of the soil.
At those places we use mat foundations to distributes the whole loads of the structure to the soil when the area of the footing was increase than the soil load bearing capacity will also increase because this foundation reduces the stress on the soil at the same place.
Commonly used type of raft is the solid slab raft without downstand beam.