Civil Engineering MCQJE Level Civil Engineering

For a T-beam, the effective flange width (bf) as per IS 456 for an intermediate beam is:

RCCRCCMEDIUM

Choose the correct answer

A

Equal to the full slab width

B

Minimum of L0/6 + bw + 6Df; c/c distance; and actual flange width

C

Only bw (web width)

D

2 × bw

Correct Answer

B. Minimum of L0/6 + bw + 6Df; c/c distance; and actual flange width

Why is this the answer?

IS 456 Cl. 23.1.2: For T-beam, bf = minimum of: (i) L0/6 + bw + 6Df; (ii) centre-to-centre distance between beams; (iii) actual flange width. Where L0 = effective span, bw = web width, Df = flange (slab) thickness. The T-beam action relies on the slab acting as compression flange.

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