Question

At the time of initial tensioning, the maximum tensile stress immediately behind the anchorage should not exceed which one of the following?

• A. 0.50 $\times$ultimate tensile stress
• B. 0.60 $\times$ultimate tensile stress
• C. 0.70 $\times$ultimate tensile stress
• D. 0.80 $\times$ultimate tensile stress

Answer 1

The correct option is D 0.80 $\times$ultimate tensile stress

As per clause 18.5.1 of IS.1343-1980, at the time of initial tensioning, the maximum tensile stress immediately behind the anchorages shall not exceed 80% of the ultimate tensile strength of the wire or bar or strand.