The document compares the Working Stress Method and Limit State Method for structural design. The Working Stress Method is an elastic, stress-based, deterministic design approach where members are designed to remain in the elastic range using allowable stresses. The Limit State Method is a plastic, strain-based, non-deterministic approach where partial safety factors are used and the material is allowed to yield and enter the plastic zone to reach ultimate strength.

1. MachenLink
RCC Limit State Method
v/s
Working Stress
Method
Booster

2. MachenLink
Working Stress Method Limit State Method
✓ WSM is an elastic design method.
✓ The stress in material is allowed to go beyond the
yield limit and enter into the plastic zone to reach
ultimate strength.
✓ LSM is strain based method.
✓ WSM is deterministic approach.
✓ In this design method, members are designed to
never go beyond their elastic range.
✓ LSM is a plastic design method.
✓ WSM is stress based method.
✓ LSM is non-deterministic method.
✓ Factor safety is used find the allowable stress. ✓ Partial Safety factors are used for Design
WSM Vs LSM