How to design Combined Strap Footing

Footings are considered as a crucial part of building foundation. They are generally built with concrete having rebar reinforcement that is poured into an excavated trench. The footings are provided to support the foundation and stop settling.

Continuous Footing: A wall footing alias strip footing refers to a continuous strip of concrete that is designed to extend the weight of a load-bearing wall over an area of soil. It belongs to the element of a shallow foundation.

A strap footing refers to an element of a building’s foundation. It refers to a sort of combined footing that includes two or more column footings attached with a concrete beam. This type of beam is known as a strap beam. The main purpose of it is to disperse the weight of either heavily or eccentrically loaded column footings to nearby footings.

A strap footing is mostly utilized along with columns which are situated along a building’s property or lot line.

Usually, columns are placed in center on column footings, but in some situations where columns are situated directly alongside the property line, the column footings may be offset as they do not intervene onto the nearby property.

This leads to an unconventional load on a part of the footing, inducing it to twist to one side. The strap beam controls the trend of the footing to overturn by relating it to adjacent footings.

Picture Courtesy & Ref.: onlinecivilforum.com