Question

The development length (in mm, rounded off to the multiple of 5) of a 16 mm diameter plain bar in compression for design bond stress $1.4$ $N/m{m}^2$ is ___.

• A. 498

Answer 1

The correct option is A 498
Given, $\varphi =16$ $mm$, ${\tau }_{bd}=1.4$ $MPa$
$L_d=\frac{0.87f_y\varphi }{4\times 1.25{\tau }_{bd}}$
$=\frac{0.87\times 250\times 16}{4\times 1.25\times 1.4}=497.14mm\approx 500mm$