RCC Structures Design
If P kg/m² is the upward pressure on the slab of a plain concrete footing whose projection on either side of the wall is a cm, the depth of foundation D is given by

D = 0.07775 aP
D = 0.00775 aP
D = 0.0775 aP
D = 0.775 Pa

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RCC Structures Design
If the depth of actual neutral axis of a doubly reinforced beam

All listed here
Is greater than the depth of critical neutral axis, the concrete attains its maximum stress earlier
Is less than the depth of critical neutral axis, the steel in the tensile zone attains its maximum stress earlier
Is equal to the depth of critical neutral axis; the concrete and steel attain their maximum stresses simultaneously

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