In prestressing work, if more than one wire or strand is included in the same duct, why should all wires/strands be stressed at the same time?

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If wires/strands are stressed individually inside the same duct, then those
stressed strand/wires will bear against those unstressed ones and trap them. Therefore, the friction of the trapped wires is high and is undesirable.

This question is taken from book named – A Self Learning Manual – Mastering Different Fields of Civil Engineering Works (VC-Q-A-Method) by Vincent T. H. CHU.

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  • SAMEER KHAN February 2, 2013 at 1:21 pm

    If the steel wires would stressed individually it will cause crakes in the structure. so its necessary to make stressing of wires at a time,

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