RCC Structures Design
If the shear stress in a R.C.C. beam is

Equal or less than 5 kg/cm², no shear reinforcement is provided
Greater than 20 kg/cm², the size of the section is changed
All of these
Greater than 4 kg/cm², but less than 20 kg/cm², shear reinforcement is provided

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

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

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