02C- Concrete-Post-Tension Cables Study Guide.

02C- Concrete-Post-Tension Cables
Study Guide.
3 - Providing additional support bars for the tendons - Answer 1 - Reverse curvature of
tendons in post-tensioned concrete construction can be avoided by _________________.



1 - Increasing the psi of the concrete

2 - Increasing the tension in the tendons

3 - Providing additional support bars for the tendons

4 - Providing additional tendons



2 - 24 hours - Answer 2 - A watertight cap should be installed on an encapsulated system for
post-tensioned concrete within ______hours after stressing is complete.



1 - 12 hours

2 - 24 hours

3 - 36 hours

4 - 72 hours



2 - 60 - Answer 3 - Where two or more extensions of the stressing jack are required to
achieve the required elongation for post-tensioned concrete, the final pull on the jack should
not exceed _____________%.



1 - 15

2 - 60

3 - 75

4 - 80



3 - 75 - Answer 4 - Tendons in post-tensioned concrete should not be stressed until the
concrete has reached about ________% of its full strength.



1 - 60

2 - 65

3 - 75

4 - 80

, 2 - 6 inches - Answer 5 - A minimum clearance of _________inches should be maintained
around all block outs in post-tensioned construction.



1 - 4 inches

2 - 6 inches

3 - 8 inches

4 - 12 inches



4 - 12 - Answer 6 - If a tendon used in a post-tensioned concrete slab is to be stressed from
both ends, at least ____ inches of tendon tail should be left outside the edge form at each end
for stressing.



1-3

2-6

3 - 10

4 - 12



4 - 80 - Answer 7 - The back stressing force applied to barrier cables should be equal to _____
% of the ultimate strength of the cable.



1 - 50

2 - 60

3 - 75

4 - 80



3 - 5 - Answer 8 - Not more than _______ 0.5" diameter tendons should be banded together
in a group in post-tensioned concrete.



1-3

2-4

3-5

4-6



1 - 1 inch - Answer 9 - W hat is the maximum that sheathing should be cut back on tendons?



1 - 1 inch