Mat Foundation Design Example Xls

The columns can be subjected to axial horizontal and moment forces.

Mat foundation design example xls.

The designer is presented with a graph showing exactly which combination of bar size and spacing is best suited to the design. Because it designs pedestals soil supported mats or pile supported pile caps in minutes you will experience significant productivity gains in completing mat. Example 8 3 4 see example 8 3 4 in textbook page 363. 10 2 types of mat foundations figure 10 1 illustrates several possible mat foundation configurations.

This approach is generally referred to as the compensated foundation design and is extremely useful when structures are to be built on very soft clays. 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. Compensated foundation the net pressure increase in the soil under a mat foundation can be reduced by increasing the depth d f of the mat. For a successful design the layout of mat foundation should be carried out with due consideration of both settlements and bearing capacity.

This type of foundation tends to be heavily overde signed for three major reasons. The designer can analyse a mat foundation of any size including up to 32 columns placed anywhere on the foundation. For example the flat slab analogy which has been very successfully used in many cases has also led to structural failures in many other cases due to lack of understanding of the basics. 45 x95 x7 0 with top of mat 3 6 below grade.

The bearing capacity increased by combining all individual footings in to one mat since bearing capacity is proportional to width and depth of foundations. Force on a pile eq on unloaded pile. Our general purpose yet comprehensive mat foundation design software. Mat or raft foundation is a large concrete slab supporting several columns in two or more rows.

The civilweb mat foundation design xls includes unique reinforcement design tools which make the design and optimisation of the reinforcement simple. This spreadsheet can be used to complete the design of mat foundations. Foundation foundation design 27 mat. Mat raft foundation design in staad pro.

It is used where the supporting soil has low bearing capacity. Instructional materials complementing fema p 751 design examples foundation design 3. Instructional materials complementing fema p 751 design examples.