Difference Between Centric And E Centric Footing | Eccentric Footing || By Civil Guruji 

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Difference Between Centric And E Centric Footing | Eccentric Footing
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The eccentric footing is a spread or wall footing that must resist a moment in addition to the axial column load and it has the shape of the shoe.
The eccentric footing is designed in such a way that the C.G (center of gravity) of the superimposed load coincides with the C.G of the base area so, resulting in uniform bearing pressure this footing is subjected to concentric loading.
Eccentric footing consists of two isolated footings connected with a structural strap and as a one unit strap connects the footing. The strap behaves like a connecting beam and when the allowable soil pressure is relatively high and distance between the columns is large then an eccentric footing is more economical than a combined footing.
This footing has to be done in cases where neighbor’s construction exists and it is not possible to adopt spread footings. When the allowable soil pressure is relatively high and the distance between the columns is large then an eccentric footing is more economical than a combined footing.
HOW TO DESIGN ECCENTRIC FOOTING?
The eccentric footing is designed in such a way that the C.G (center of gravity) of the superimposed load coincides with the C.G of the base area so, resulting in uniform bearing pressure this footing is subjected to concentric loading.
It may not be possible to do so in some cases i.e it will not be possible to spread the footing to both the sides of the wall or column if the wall or column under construction is near some other property