Question

The minimum strain at failure in the tensile reinforcement $(f_y=400MPa)$ of RCC beam as per limit state method is

• A. 0.0020
• B. 0.0028
• C. 0.0037
• D. 0.0045

Answer 1

The correct option is C 0.0037

(c)
Minimum strain is given by

${ϵ}_s=0.002+\frac{0.87f_y}{E_s}$

$\therefore {ϵ}_s=0.002+\frac{0.87\times 400}{2\times {10}^5}=0.0037$