Footings are an important part of foundation construction. They are typically made of concrete with rebar reinforcement that has been poured into an excavated trench. The purpose of footings is to support the foundation and prevent settling.
Types of footings:
Wall footing/strip footing.
Mat or raft foundation.
Combined Strap Footing
A wall footing or strip footing is a continuous strip of concrete that serves to spread the weight of a load-bearing wall across an area of soil. It is the component of a shallow foundation.
A strap footing is a component of a building’s foundation. It is a type of combined footing, consisting of two or more column footings connected by a concrete beam. This type of beam is called a strap beam. It is used to help distribute the weight of either heavily or eccentrically loaded column footings to adjacent footings.Combined Strap Footing design excel sheet can be prepared to easily to design the calculation program to design calculation.
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A strap footing is often used in conjunction with columns that are located along a building’s property or lot line. Typically, columns are centered on column footings, but in conditions where columns are located directly adjacent to the property line, the column footings may be offset so that they do not encroach onto the adjacent property.This results in an eccentric load on a portion of the footing, causing it to tilt to one side. The strap beam restraints the tendency of the footing to overturn by connecting it to nearby footings.