Civil Engineering MCQAE Level Civil Engineering
The design bond stress τ_bd for M20 concrete in IS 456 LSM is:
RCCDevelopment Length FormulaMEDIUM
Choose the correct answer
A
1.0 N/mm²
B
1.2 N/mm²
C
1.6 N/mm²
D
2.0 N/mm²
Correct Answer
B. 1.2 N/mm²
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IS 456:2000 Table 26 (Cl. 26.2.1.1): Design bond stress τ_bd for plain bars in tension for M20 concrete = 1.2 N/mm². For deformed bars, this is increased by 60% to 1.92 N/mm².
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