RCC Structures Design
If Sb, is the average bond stress on a bar of diameter ‘d’ subjected to maximum stress ‘t’, the length of the embedment ‘l’ is given by

l = dt/4Sb
l = dt/2Sb
l = dt/Sb
l = dt/3Sb

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RCC Structures Design
In a beam the local bond stress Sb, is equal to

Leaver arm/(Shear force × Total perimeter of reinforcement)
Leaver arm/(Bending moment × Total perimeter of reinforcement)
Total perimeter of reinforcement/(Leaver arm × Shear force)
Shear force/(Leaver arm × Total perimeter of reinforcement)

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