Mat Foundation Design Pdf

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

Mat foundation design pdf.

Instructional materials complementing fema p 751 design examples bearing pressure solution plastic solution is satisfactory. 10 2 types of mat foundations figure 10 1 illustrates several possible mat foundation configurations. Probably the most common mat design consists of a flat concrete slab 0 75 to 2 m thick and with continuous two way reinforcing top and bottom. The structural design of mat foundations can be carried out by two conventional methods.

Elastic is not. 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. Design will require extension of the column foundation beyond the property line. If the net allowable soil pressure is known.

Mat foundations topics. The bearing capacity increased by combining all individual footings in to one mat since bearing capacity is proportional to width and depth of foundations. Although mat foundations are more difficult and more costly to design than individual spread footings they can be used effectively. 45 x95 x7 0 with top of mat 3 6 below grade.

This type of foundation tends to be heavily overde signed for three major reasons. Mat or raft foundation is a large concrete slab supporting several columns in two or more rows. In such a case two or more columns can be supported on a single rectangular foundation as shown in figure 5 1b. Foundation design 28 a plastic solution b elastic solution.