Civil Engineering MCQJE Level Civil Engineering
As per IS 456, the basic span-to-effective depth ratio for a simply supported slab with Fe415 steel is:
RCCRCCEASY
Choose the correct answer
A
16
B
20
C
26
D
7
Correct Answer
B. 20
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IS 456 Cl. 23.2.1: For simply supported spans, basic l/d = 20 (for spans up to 10 m). This ratio controls deflection without calculation. For continuous slabs it is 26, cantilevers 7. Modifications apply for steel stress and reinforcement percentage.
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