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

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

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RCC Structures Design
Based on punching shear consideration, the overall depth of a combined footing under a column A, is

(Area of the column A × Safe punching stress)/Load on column A
(Perimeter of column A × Safe punching stress)/(Load on column A × Upward pressure × Area of the column)
(Perimeter of column A × Safe punching stress)/(Load on column A + Upward pressure × Area of the column)
None of these

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