RCC Structures Design
To ensure uniform pressure distribution, the thickness of the foundation, is

Kept uniform throughout
Increased gradually towards the edge
Kept zero at the edge
Decreased gradually towards the edge

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RCC Structures Design
A pre-stressed concrete member is preferred because

All listed here
Its dimensions are not decided from the diagonal tensile stress
Large size of long beams carrying large shear force need not be adopted
Removal of cracks in the members due to shrinkage

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