RCC Structures Design
If d is the diameter of a bar, ft is allowable tensile stress and fb, is allowable bond stress, the bond length is given by

ft .d/4fb
π ft .d²/fb
(π/4). (ft .d3/fb)
(π/4). (ft .d/fb)

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

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

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