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

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

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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)
(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
None of these

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RCC Structures Design
According to I.S. : 456, slabs which span in two directions with corners held down, are assumed to be divided in each direction into middle strips and edge strips such that the width of the middle strip, is

Two-third of the width of the slab
Four-fifth of the width of the slab
Half of the width of the slab
Three-fourth of the width of the slab

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