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

[Srinivasan]

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

(A) ft .d/4fb

(B) ( /4). (ft .d/fb)

(C) ft .d²/fb

(D) ( /4). (ft .d3/fb)

The correct Answer Is
(A) ft .d/4fb

 

[Jimmi6353]

Answer is (A).
Refer : As per IS 456:2000 development length section equation