Curve TRINITI HIGHWAY CASS S4, Руководство по сборке изделия

Страница: 28 / 42

TrinityHighway.com 27 Created November 2021
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. Check to make sure 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
®
S4(29) 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.
Important:
Completely review the manufacturer ’ s manual included with the
tensioning meter prior to tensioning of the cable.
Important:
Ensure that the tension meter is set for pre-stretched cable.
Important: Completely r
eview the infrared thermometer manufacturer’s
manual prior to tensioning of the cable.