RCC Structures Design
The maximum shear stress (q) in concrete of a reinforced cement concrete beam is

Lever arm/(Shear force × Width)
(Shear force × Width)/Lever arm
Width/(Lever arm × Shear force)
Shear force/(Lever arm × Width)

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RCC Structures Design
If the length of a combined footing for two columns l meters apart is L and the projection on the left side of the exterior column is x, then the projection y on the right side of the exterior column, in order to have a uniformly distributed load, is (where x̅ is the distance of centre of gravity of column loads).

y = L - (l - x̅)
y = L/2 - (l - x̅)
y = L/2 + (l - x̅)
y = L/2 - (l + x̅)

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