RCC Structures Design
The spacing of transverse reinforcement of column is decided by the following consideration.

The least lateral dimension of the column
Sixteen times the diameter of the smallest longitudinal reinforcing rods in the column
Forty-eight times the diameter of transverse reinforcement
All listed here

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

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