Sliding Calculation

[designer]

Can we use both side pressure and base friction against sliding?

[ohleng]

You can use below loads for sliding calculation. Please do not forget multiple them with reduction factors.
Shear load + Soil lateral load = Acting lateral load (ALL)
Passive pressure at pad area depth X Pad Area = Footing lateral resisting (FLR)
Vertical Load+Soil Load+Concrete Load = Friction Resisting Load (FRL)
FLR+FRL > ALL

Cheers