What is the difference between "working stress method"
And "limit state method"?

Answer Posted / venkadeshwaran

In WSM the factor of safety of concrete is assumed to be 3 and factor of safety of steel is 1.8,so that it requires more percentage of steel and also in WSM the concrete and steel have a linear variation in elastic property.It is one of the main reason for failure of this method.
In LSM the factor of safety of concrete is assumed to be 1.5 and factor of safety of steel is 1.15.so that the percentage of steel rods used is very less when compared to the WSM.

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