Direction: A singly reinforced rectangular concrete beam has a width of 150 mm and an effective depth of 330 mm. The characteristics compressive strength of concrete is 20 MPa and the characteristics tensile strength of steel is 415 MPa. Adopt the stress block for concrete as given in IS: 456-2000 and take limiting value of depth of neutral axis as 0.48 times the effective depth of the beam.
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The limiting area of tension steel in mm2 is
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- 473.9
- 412.3
- 373.9
- 312.3
Correct Option: A
0.87 fy Ast = 0.30 fck = b.xlimit
| ∴ Ast = | 0.87 × 415 |
= 473.82 mm2
