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What is the maximum permissible tensile stress for high concrete gravity dam under worst conditions?

What is the maximum permissible tensile stress for high concrete gravity dam under worst conditions? Correct Answer 500 KN/m2

The masonry and concrete gravity dams are usually designed in such a way that no tension is developed anywhere in the structure. The maximum permissible tensile stress for high gravity dams is taken as 500 KN/m2 under worst conditions. If subjected to such tensile stresses crack develops near the heel.

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