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What is the modular ratio to be used in the analysis of RC beams using working stress method if the grade of concrete is M20?
- A18.6
- B13.3
- C9.9
- D6.5
Answer not set
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CCommunity
As per IS: 456-2000, modular ratio is given by
$(m = \frac{{280}}{{3{\sigma _{cbc}}}})$
For M20 concrete
σcbc = 7 N/mm2
$(\therefore m = \frac{{280}}{{3 \times 7}} = 13.3)$
$(m = \frac{{280}}{{3{\sigma _{cbc}}}})$
For M20 concrete
σcbc = 7 N/mm2
$(\therefore m = \frac{{280}}{{3 \times 7}} = 13.3)$