Trinity 620005, Инструкция по сборке

Страница: 28 / 42

TrinityHighway.com 27 Revision F November 2021
4. Place the low top cable in the notch at top of the post (See Figure 9). Place a
spacer (PN-5700B (black), PN-5701B (yellow) or PN-5702B (white)) on top of the
cable.
5. Place the top cable on top of the spacer. Place a post strap (PN-105202T) on
top of the cable (See Figure 10).
It is recommended before tensioning that for runs of cable greater than 5,000’ [1,525 m], to
pull the cable at intervals of 3,000’ [915 m] to remove excess slack Ensure no turnbuckles or
torpedo splices will interfere with the posts during the tensioning. If there are any, remove
the post(s) or the cables from the post.
Important:
For long runs of cable, check the turnbuckles at every location
to ensure the cable has not unthreaded during the laying out or slack pulling
process. Ensure the threaded rod can be seen through the holes on each
end of the turnbuckle and the 1 1/2” [38 mm] mark cannot be seen.
Tensioning and Tension Meter
After all of the cables have been placed in the posts, tensioning can take place. The tension
placed on the cables is to be determined by the cable temperature at the time of tensioning. The
tension meter shall be set for pre-stretched cable. An infrared thermometer is to be on-site at the
point of tensioning to obtain the correct cable temperature. If an infrared thermometer is not
available, obtain the air temperature from a reliable source in the immediate area and not
influenced by other factors. See the CASS
®
S3 Temperature and Tension Chart for the tension
requirements at the back of this manual.
Note:
Due to frictional forces, it is recommended to start tensioning from the bottom
cable, working upwards to the top cable.
The means of placing tension on the cable will be determined by the contractor. Whatever
means is chosen, it must ensure that the tension from the tension chart can be obtained.