RCC Structures Design
The minimum thickness of a flat slab is taken

L/36 for interior panels without drop
All listed here
L/32 for end panels without drops
L/36 for end panels without drops

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

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

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