What happens if you forgot to stress an unbonded post-tensioning tendon at the construction joint and have already poured the subsequent pour? . . . → Read More: Missed Stressing Operation
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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 for additional information. _________________________________________________ Copyright © 2011 by AMSYSCO, Inc. All rights reserved. . . . → Read More: Video : Applying paint mark for Tendon Elongation As a post-tensioning inspector or installer, have you ever been in a situation whether you are unsure whether some PT tendons have been stressed? By not having a PT tendon stressed, this could have detrimental effects on the structure. Here are three pointers that may help you out: 1. PAINT-MARKS : Compare the location of the . . . → Read More: How do I know if my Post-Tensioning Tendons have been stressed? The friction-loss calculations are important submittals for post-tensioning tendons. The calculations determine what the tendon’s final force is after short-term and long-term friction losses. The key input parameters for “Long-Term Losses” are as follows: Post-Tensioning System (Unbonded or Bonded) Type of Strand (usually Low-Lax) Ultimate Strength of Strand (usually 270 ksi) Modulus of Elasticity of . . . → Read More: Post Tension Friction-Loss Calculations |
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