The permissible tensile stress in HYSD reinforcement used for water tanks is
- A110 MPa
- B130 MPaCorrect
- C150 MPa
- D190 MPa
Solution
Concept
Permissible steel stress in liquid retaining structures
Formula
σst = 130 MPa
Step-by-step solution
1. IS 3370 gives 130 MPa for HYSD bars (up to 16 mm) on the liquid-retaining face. 2. Other values (e.g. 190 MPa) apply to faces away from the liquid.
Explanation
The low stress limits crack width in tanks.
Why the other options are wrong
Others are not the limit for the liquid face.
Shortcut
Liquid face HYSD = 130 MPa.
Correct answer: B) 130 MPa