Question

The development length (in mm) in compression for a 16 mm diameter deformed bar of grade Fe415 embedded in concrete of grade M25 whose design bond stress is 1.4 $N/m{m}^2,$ is ______

• A. 515.79

Answer 1

The correct option is A 515.79
Development length for HYSD base in compression.

$l_d=\frac{0.87f_y\varphi }{4{\tau }_{bd}(1.25\times 1.6)}$

$=\frac{0.87\times 415\times 16}{4\times 1.4\times (1.25\times 1.6)}=515.79mm$