Unbonded Post Tensioning Manual Flashcards
Waht is the main reason for tendons in conrete floors?
- Tension.
Curing of concrete causes the tendons load or stress at ____ point?
- 75%
_____________ prior to pouring concrete mix in order to separate the strands form the concrete.
- Strands are covered with a p/t coanting and encased in high density polyethylene sheathing.
The proper method to unload post-tension cables________?
- Nylon Strap
You would lift coils of post tension cables by _____________ ?
- Cradleling the coils in the nylon straps by passing straps through the center of the coil.
The correct way to store post-tension cables on a job site is to __________?
- Store in a dry area on a dunnage to keep tendons off the ground.
If a tendon is stressed at both ends, ________ is the recommended lenght of tail to leave outside form the edge of each end.
- 12”.
The maximum number of 1/2 inch tendons allowed in a post-tension bundle _____.
- 5.
The maximum number of 0.6 inch tendons allowed in a post tension bundle ______.
- 4.
Minimize cracking by ________________.
- reinforce the top and bottom of slab at openings with diagonal bars.
The minimum clearance of tendons at a block-out for small or medium openings is ______.
- 6”.
Minimum size bar used in post-tensioning support_______.
- # 4 bar.
The minimum spacing of tendons in a beam is _______.
- 1 1/2”.
Reverse curvature is addressed by ______.
- Additional bars.
__________ procedure is unacceptable in grouting stressing pockets in a post-tension system.
- The use of chlorides as an admixture.
