RCC Structures Design
Enlarged head of a supporting column of a flat slab is technically known as

Drop panel
Supporting end of the column
Top of the column
Capital

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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
Removal of cracks in the members due to shrinkage
Large size of long beams carrying large shear force need not be adopted

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