Mat Footing Design Example Pdf

Mat or raft foundation is a large concrete slab supporting several columns in two or more rows.

Mat footing design example pdf.

Force on a pile eq on unloaded pile. Instructional materials complementing fema p 751 design examples foundation design 3. The building has a 10 ft high basement. The conventional rigid method of mat foundation design can be explained.

Foundation foundation design 27 mat. It is used where the supporting soil has low bearing capacity. Instructional materials complementing fema p 751 design examples. This approach is generally referred.

45 x95 x7 0 with top of mat 3 6 below grade. Footings example 1 design of a square spread footing of a seven story building design and detail a typical square spread footing of a six bay by five bay seven story building founded on stiff soil supporting a 24 in. The bottom of the footing is 13 ft below finished 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.

Example 5 2 illustrates the analysis and design of deep foundations for a building similar to the one highlighted in chapter 7 of this volume of design examples. 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. Load path and transfer of seismic forces. Although mat foundations are more difficult and more costly to design than individual spread footings they can be used effectively.