Question

The maximum depth of neutral axis for a beam with 'd' as the effective depth, in limit state method of design for Fe 415 steel is

• A. 0.46d
• B. 0.48d
• C. 0.50d
• D. 0.53d

Answer 1

The correct option is B 0.48d

(b)

$x_{u,max}=\left[\frac{0.0035}{0.0055+\frac{0.87f_y}{E_s}}\right]d$

for $f_y=415N/m{m}^2$

and $E_s=2\times {10}^{5}N/m{m}^2$

and $x_{u,max}=0.48d$

for $f_y=250N/m{m}^2$

$x_{u,max}=0.53d$