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A pretensioned concrete beam, 100mm wide and 300mm deep in prestressed by straight wires and modulus of elasticity of steel and concrete are 210 and 35n/mm2. Find modular ratio?

A pretensioned concrete beam, 100mm wide and 300mm deep in prestressed by straight wires and modulus of elasticity of steel and concrete are 210 and 35n/mm2. Find modular ratio? Correct Answer 6

b = 100mm, d = 300mm, Es = 210kn/mm2, Ec = 35n/mm2 αe = Es/Ec = (210/35) = 6n/mm2.

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