Category Archives: Field Issues
The importance of clean anchor cavities
Having clean anchor cavities is one of the most important part of getting proper elongations of unbonded post-tensioning tendons. Since construction is not the cleanest of jobs, there may be debris inside the PT anchor cavity. A major cause of … Continue reading
Video : Stressing Unbonded Post Tension Tendon
This short video show the stressing an unbonded post-tensioning tendon with a hydraulic jack (8-inch stroke). This tendon was roughly 130 feet long so it required two strokes. The elongation for a 100-foot-long tendon is roughly 8 inches. Refer to … Continue reading
Video : Applying paint mark for Tendon Elongation
This short clip shows how to apply paint-marks prior to stressing of post-tension tendons. It’s recommended to use a straight-edge, metal to help with elongation measurements. Refer to the Post-Tensioning Institute’s “Field Procedures Manual for Unbonded Single-Strand Tendons” Chapter 7 … Continue reading