Training and Certification of Field Personnel for Unbonded Post Tensioning Questions and Answers.

Training and Certification of Field
Personnel for Unbonded Post
Tensioning Questions and Answers.

What word best describes an upward deformation caused by the application of a prestressing
force?

Blowout

Cantilever

Creep

Camber - Answer Camber

Pg 2



Concrete must be at ________% of its full strength before pulling the tendons in post-tensioned
concrete

60%

80%

75%

55% - Answer 75%

Pg 8



High density polyethylene sheathing is what _______ are protected by

Tendons

Joints

Cap piles

Footings - Answer Tendons

Pg 13



What would be the best method to use for off-loading the post tensioning cable from a flatbed
truck?

Using a forklift to raise bundles with hooks

Chain through the center of the bundle

Nylon strap that cradles the coil by passing through the center of the bundle

Pick it up with backhoe forks - Answer Nylon strap that cradles the coil by passing through
the center of the bundle

Pg 27

, The maximum distance to cut back sheathing for the anchor is:

2"

1 1/2"

1"

3" - Answer 1"

Pg 32



If a tendon is stressed at both ends, what is the recommended length of tail to leave outside the
edge form at each end?

6"

8"

10"

12" - Answer 12"

Pg 32



If there are 5 tendons in a group, what is the maximum diameter for each tendon?

1 1/2"

1"

1/2"

2 1/2" - Answer 1/2"

Pg 34



What is the maximum number of 0.6" tendons allowed in a post-tension bundle?

6

3

4

5 - Answer 4

Pg 34



For small or medium openings, the clearance of tendons at a blockout should be at least ____"

4

6

5

3 - Answer 6