CommScope Trunk & Distribution Cable - Manual (Page 36)

Tensioning
The length of self-supporting cable that can be tensioned at one time will depend on several factors such as
corners, span length, changes in grade, and maximum pulling tension. However, lengths up to 1000 feet can
generally be tensioned satisfactorily in straight sections of pole line. Use a chain hoist, strand puller, and sling to
remove slack and tension the strand. The strand puller can be used over jacketed steel.
Note: Strand and cable at corner poles and grade changes should be in the clamps or dead ended prior to
tension being applied.
When the span/s are tensioned and sagged, move from pole to pole separating the steel and cable prior to
clamp placement.
Caution: To prevent damage to the cable, separate the cable and steel before using a strand puller. The pin
attaching the safety chain will cause severe damage to the cable.
A tensiometer may be used to monitor tension on the strand. The tensiometer is placed between the hoist and
strand puller so the tension can be read directly from the scale as the cable is being sagged. This method is very
useful on long lengths to prevent undue stress on the steel. See steel strand specifications table in section 4.6.
Caution: Permanent down guys should be in place at the first, last, and any intermediate poles before tensioning
to final sag to prevent unbalanced loads.
All spans should be tensioned and placed in clamps during the workday. Do not leave the cable
suspended in roller blocks from one workday to the next.
4.7 Integrated Messenger Installation
Stationary Reel Method