What is the modular ratio to be used in the analysis of RC beam using working stress method if the grade of concrete is M 20?

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VideRime Staff asked 5 years ago
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What is the modular ratio to be used in the analysis of RC beam using working stress method if the grade of concrete is M 20?

VideRime Staff replied 5 years ago

As per IS: 456-2000 modular ratio is
given by
M = 280/3σ cbc

For M20 concrete
σ cbc =7N/mm 2

∴ m=280/3×7
= 13.3