Question

The limiting percentage of tensile reinforcement in a $RCC$ beam depends on:
1. Grade of concrete

2. Grade of steel

3. Depth of the beam

4. Cover to the reinforcement

• A. 1 and 2
• B. 2 only
• C. Depth of the beam
• D. Cover to the reinforcement

Answer 1

The correct option is A 1 and 2

$p_{t,lim}=41.38\left(\frac{f_{ck}}{f_y}\right)\left(\frac{x_{u,max}}{d}\right)$
$=41.38\left(\frac{f_{ck}}{f_y}\right)\frac{0.0035}{(\frac{0.87f_y}{E_s}+0.0055)}$
$\therefore p_{t,lim}$ depends upon grade of concrete and steel only.