Multiple choice

In the design of beams for the limit state of colapse in flexure as per IS : 456-2000, let the maximum strain in concrete be limited to 0.0025 (in place of 0.0035). For this situation, consider a rectangular beam section with breadth as 250 mm, effective depth as 350 mm, area of tension steel as 1500 mm2, and characteristics strengths of concrete and steel as 30Mpa and 250 MPa respectively.

The depth of neutral axis for the balanced failure is

  1. 140 mm

  2. 156 mm

  3. 168 mm

  4. 185 mm

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B Correct answer
Explanation