House Mat Foundation Design

Finite difference and finite element methods can also be used but this section covers only the basic concepts of the first design method.

House mat foundation design.

Design of mat raft foundation mat or raft foundation is a large concrete slab supporting several columns in two or more rows. The width of footings should be laid according to structural design. Design of raft foundation page 13 3 3 0 why raft should be used. 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.

The conventional rigid methodand the approximate flexible method. In addition to the provisions of this chapter the design and construction of foundations in flood hazard areas as established by table r301 2 1 shall meet the provisions of section r322 wood foundations shall be designed and installed in accordance with awc pwf. This foundation will be used for a loose sand soil. The provisions of this chapter shall control the design and construction of the foundation and foundation spaces for buildings.

For light loaded buildings such as houses flats school buildings etc have not more than two storeys the width of the foundation is given below. 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. This foundation supports the entire building loads and safely transfer it to the ground. Example 5 2 illustrates the analysis and design of deep foundations for a building similar to the one.

The structural design of mat foundations can be carried out by two conventional methods. It is used where the supporting soil has low bearing capacity. The width of the footing should not be less than 75 cm for one brick thick wall. What is known plate mechanics.

Mat foundation design can be highly variable designs that consider this variability are encouraged. Post and pier foundation. It is a continuous thick concrete slab on the soil that extends the entire footprint of the building and increases the soil bearing capacity power. Example 5 1 completes the analysis and design of shallow foundations for two of the alternative framing arrangements considered for the building featured in example 6 2.

If a single square footing need to be designed under the maximum axial load that is occurred in columns type 4. Design of foundation elements. Overall it is an easier system to build and less expensive than the more common perimeter concrete foundation. The properties used in the analysis and the design of this raft foundation are shown in table 4.

Mat foundation is also known as the raft foundation.