Mat Foundation Mat Footing Design

Download free demo updated february 18 2019 soilstructure mat or raft foundation simplifies the calculation of combined footings and mats or rafts.

Mat foundation mat footing design.

Complete analysis design of a mat or raft foundation analyses uniform thickness finite mat or raft foundation with free ends and supported by a beam on elastic foundation. The bearing capacity increased by combining all individual footings in to one mat since bearing capacity is proportional to width and depth of foundations. Raft mat foundation is used in those places where we have less bearing capacity of the soil. Footings are designed based on the nature of the loading the properties of the footing and the properties of the soil.

At those places we use mat foundations to distributes the whole loads of the structure to the soil when the area of the footing was increase than the soil load bearing capacity will also increase because this foundation reduces the stress on the soil at the same place. Spreadsheets are hard. Footing design by s. Mat foundations are sometimes preferred for soils that have low load bearing capacities but that will have to support high column or wall loads.

Mat foundation raft foundation it is a combined footing that may cover the entire area under a structure supporting several columns and walls. Mat foundations also are known as raft foundations is a thick concrete slab placed on the ground as the foundation of the structure. 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. Although mat foundations are more difficult and more costly to design than individual spread footings they can be used effectively.

Ali mirza1 and william brant2 5 1 introduction reinforced concrete foundations or footings transmit loads from a structure to the supporting soil. Mat foundations are constructed on various occasions such as building construction bridge construction tower construction etc. Mat or raft foundation is a large concrete slab supporting several columns in two or more rows. Design of a footing typically consists of the following.