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7.5.5 Routing Lift Lines
Note:
The Vortek hoists have up to 7 lift lines per batten; depending on the installation, all lift lines may come
out of the end of the hoist or there may be one or two cables coming directly out of the bottom of the
unit at either end.
ETC ships all wire ropes equal to the longest length.
CAUTION:
Figure 21
illustrates a unit with 7 lines: 2 lines drop directly out of the hoist and 5 lines come out of the
Tail End.
WARNING:
7.5.6 Terminating Wire Rope Cables
Once the cables have been routed through the loft blocks, assuring that there are no crossed lines and
the excess is on the ground, the cables are ready for termination.
CAUTION:
In most situations the theatre consultant or architect will specify a trim height for the battens to reside
when at their lowest point.
Be sure to compensate for all attachment hardware prior to cutting the cables to their final length.
Note:
Vortek hoists use 3/16" wire rope for all standard installations. A 3/16" Nicopress aluminum sleeve
with thimble is provided for use to terminate the cable end to the turn buckle or trim chain. Only
genuine Nicopress tools with the correct crimping inserts for the provided sleeves must be used.
23
Each Vortek NXT project has a detailed set of job drawings which determine the
installation location of each hoist and the related equipment. Refer to these drawings
for system layout, lift line layout, and location.
Lift lines exiting the hoist must not be greater than a 2 degree angle in either
the horizontal or vertical direction.
Figure 21: Example of routing lift lines
Be careful that through cables do not cross over each other when routing.
The pass-through idler area on a block is usually not load bearing.
For maximum travel, before cutting the wire rope, ensure that there are three
dead wraps on the drum at the bottom of travel. More than three dead wraps
of wire rope on the drum will prevent full rated travel of the batten.
Do not cut the wire rope of double-purchase units. These must be terminated at the
I-beams on the dead-off connection.
Vortek NXT Hoist User Operations Manual
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