RCC Structures Design
An under-reinforced section means

Steel provided is insufficient
Steel is provided at the underside only
Steel will yield first
Steel provided on one face only

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

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
(Perimeter of column A × Safe punching stress)/(Load on column A + Upward pressure × Area of the column)

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