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Question
The permissible bending tensile stress in concrete for the vertical  wall of an RC water tank made of  M30 concrete is
A.
1.7 N/mm2
B.
1.8 N/mm2
C.
2.0 N/mm2
D.
2.5 N/mm
Answer ( Option C)

2.0 N/mm2

Solution

 
Permissible bending tensile stress (σcbt) in concrete for vertical wall of RC water tank is as follows:
Grade            σcbt (N/mm2)       
M20                1.7
M25                1.8
M30                2.0

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