Category Archives: Field Issues

PT Tendon Breakage at Fixed End Anchor

On occasion, a post-tension cable may break at the fixed end anchor during the stressing operation.  The possible causes of tendon breakage include: A kink in the steel strand. Incorrect fixed-end seating of wedges. A concrete void behind the fixed-end anchor. … Continue reading

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Missed Stressing Operation

Q: What happens if you forgot to stress an unbonded post-tensioning tendon at the construction joint and have already poured the subsequent pour? A: The most preferred option is to stress the tendon in the subsequent pour. However, the following … Continue reading

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Detensioning Unbonded Post-Tension Tendons

On rare occasions, the ironworker/installer will need to detension an already-stressed post tensioning tendon. The reason may be due to a repair procedure or re-stressing due to out-of-range elongation readings. Recommendations: During the detensioning process, the post-tensioning tendon will have … Continue reading

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