Where are mat foundations used?
Mat foundations are popular in areas where basements are common. Mat foundation is also used for low bearing capacity soil in order to spread the load of a building and hence construct a stable foundation. It is used to reduce differential settlement of buildings.
What are the methods available for designing mat foundation?
Design of Mat Foundations with Conventional Rigid Method Check whether the net allowable press is grater than applied pressure. Then the mat is divided into the strips based on its arrangement. Determine the bending moment and shear forces. Determine the effective depth of the footing.
When would you use a mat footing?
Mat footings are used when the building load is so high, that spread or strip footings could not bear the weight or their employment would be inefficient. Furthermore, mat footings are helping to reduce the varying settlements caused by construction on non-homogenous soils or uneven load distribution on the footing.
How does a mat foundation work?
A raft foundation, also called a mat foundation, is essentially a continuous slab resting on the soil that extends over the entire footprint of the building, thereby supporting the building and transferring its weight to the ground. This reduces the stress on the soil.
What is the difference between raft and mat foundation?
Usually, mat foundation is spread over the entire area of the structure it is supporting. Raft foundation is generally used to support structures like residential or commercial buildings where soil condition is poor, storage tanks, silos, foundations for heavy industrial equipment etc.
What is the difference of spread and mat footing?
A spread footing is a circular, square or rectangular slab of uniform thickness. A mat or raft foundation is a large slab supporting a number of columns and walls under the entire structure or a large part of the structure.