Answer Posted / v rajesh
Total axial load transmitted to the footing is P. Area of the footing will be A=LxB.
Certain moments will be definitely transferred to the footing in question = M.
Z is the section modulus of footing.
P1 and P2 are the intensity of pressure taking positive sign and negative sign respectively.
There should be no tension in the footing. Taking the pressure intensity into consideration
from one edge of the footing Moment should be calculated . Then using the formula
M= Qbd2eff.
d effective to be calculated.
D= d effective + cpver.
D is the depth of the raft of the foundation.
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