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In limit state method of design, the value of permissible shear stress in concrete when shear reinforcement is not provided is
1. 0.16(fck)½
2. 0.25(fck)½
3. 0.34(fck)½
4. 0.48(fck)½

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Correct Answer - Option 2 : 0.25(fck)½


(i) As per CI. of IS 456:2000, When shear reinforcement is not provided. the calculated shear stress at the critical section shall not exceed kτc

Where Ks = (0.5 + βc) ≤ 1, βc being the ratio of short side to long side of the column and τc = 0.25√fck ib limit state method of design, and 0.16√fck in WSM

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