Why water tanks are designed by working stress method?

Why Working Stress Method (WSM) for Water Tanks? Water tanks or any liquid retaining structures are vulnerable to stresses with the variation of water level in it. When compared with limit state method of design, the WSM method provide more serviceability that help to increase the durability and life of water tanks.

Why the working stress method is used for design of any mass RC structure?

For This Reason, structures designed by WSM give better serviceability performance (i.e., less deflection, less crack width, etc.. ) under working loads. WSM is the only method available when one has to investigate the R.C. section for service stresses and for the serviceability states of deflection and cracking.

What is meant by working stress method?

1. Working stress method (WSM) The method basically assumes that the structural material behaves as a linear elastic manner, and that adequate safety can be ensured by suitably restricting the stresses in the material induced by the expected “working loads” on the structure.

Which of the following grade concrete will you prefer for construction of water tank?

Explanation: As per codal provisions of IS 3370: Minimum grade of concrete for the R.C.C water tank is M30. Maximum cement content is 400 kg/m3 to take care of shrinkage effect.

What are the working stress design method?

Working Stress Design Method is a method used for the reinforced concrete design where concrete is assumed as elastic, steel and concrete act together elastically where the relation ship between loads and stresses is linear .

What is construction material stress?

Stress is resistance provided by structural material against deformation. Stress is measured in terms of load per unit area and is expressed in MPa or N/mm2.

What are the stresses for which water tanks are designed?

Permissible stress in steel If steel is placed on the face away from the liquid for members 225 mm or more in thickness then permissible stress in steel shall be 125 N/ mm2 for mild steel bars and 190 N/ mm2 for high strength deformed bars.