Mat Slab Foundation Design

It is used where the supporting soil has low bearing capacity.

Mat slab foundation design.

A mat foundation also may be used to resist hydrostatic pressures or to bridge over small soft spots in the soil provided the mat is adequately reinforced. Although mat foundations are more difficult and more costly to design than individual spread footings they can be used effectively. Mat or raft foundation is a large concrete slab supporting several columns in two or more rows. The construction of mat foundation.

The columns are placed on the intersection of beams. Typically reinforced with a double layer of rebar throughout its pad a mat slab is capable of bearing loads at virtually any point and distributing heavy loads across an expanse of weak subsoil. In this type of mat foundation beams are placed in perpendicular directions and all the beams are connected by rcc slab. Though little known 10 years ago today mat slabs are a standard solution for building sites with difficult soil conditions.

The building then rests on this foundation leading to lesser contact with the land and hence more strength and stability. The bearing capacity increased by combining all individual footings in to one mat since bearing capacity is proportional to width and depth of foundations. Two way slab and beam raft foundation is suitable when the columns are carrying unequal loads and the spacing is large between them. Mat foundation is constructed as a large slab which works as the base for the building.

It is used to support storage tanks industrial equipment silos chimneys and various tower structures.