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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 ×ultimate tensile stress
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B
0.60 ×ultimate tensile stress
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C
0.70 ×ultimate tensile stress
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D
0.80 ×ultimate tensile stress
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Solution

The correct option is D 0.80 ×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.

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