How do we calculate the building footing calculation ?

Answer Posted / sachin kesarkar

FOR RECTANGULAR FOOTING VOLUME= L*B*H
WHERE L=LENGTH B=BREDTH H=HEIGHT
FOR TRAPEZOIDAL FOOTING VOLUME=h/3(A1+A2+ROOT A1.A2)
WHERE h=HEIGHT A1=TOP SURFACE AREA A2=BTM.SURFACE AREA.
THERE ARE ALSO THE FOOTINGS WHICH ARE NOT PERFECTLY
TRAPEZOIDAL, IN THAT CASE WE HAVE CALCULATE IT WITH
TRAPEZOIDAL HAVING 5% VARIANCE.

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