RCC Structures Design
As the percentage of steel increases

Depth of neutral axis decreases
Lever arm increases
Lever arm decreases
Depth of neutral axis increases

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

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
All listed here

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RCC Structures Design
The spacing of transverse reinforcement of column is decided by the following consideration.

Sixteen times the diameter of the smallest longitudinal reinforcing rods in the column
The least lateral dimension of the column
All listed here
Forty-eight times the diameter of transverse reinforcement

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