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
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
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