RCC Structures Design
According to the steel beam theory of doubly reinforced beams

Stress in tension steel equals the stress in compression steel
Tension is resisted by tension steel
Compression is resisted by compression steel
All of the listed here

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

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

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RCC Structures Design
If the length of a combined footing for two columns l meters apart is L and the projection on the left side of the exterior column is x, then the projection y on the right side of the exterior column, in order to have a uniformly distributed load, is (where x̅ is the distance of centre of gravity of column loads).

y = L/2 - (l - x̅)
y = L/2 - (l + x̅)
y = L/2 + (l - x̅)
y = L - (l - x̅)

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