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Electronic Theatre Controls Inc

Dead Hang - Helix Cable Management

Helix Cable Management is available in four standard mounting variants:

  • FlyPipe
  • ColorSource Raceway w/ batten
  • 7099 Series Standard Distro w/ batten
  • Pipe-mount

The minimum dead hang requirements vary for each mounting type. In the chart below the Helix Dead Hang + Travel Height is the total distance from the Helix mounting point at the steel to low trim. The chart details the minimum dead hang required for each mounting variant and the available system travel for each.

Helix CM Minimum Dead Hang Chart.PNG

General Dead Hang Information

The dead hang for an ETC hoist and/or cable management system is measured from the underside of the mounting steel to the center of batten (or bottom of the strut channel on FlyPipe).

The minimum dead hang values include the following:

  • The distance from the first obstruction (loft block, compression tube, powerhead, etc.) to the mounting steel
    • Varies by hoist type, mounting, and loft block dimensions
  • The recommended minimum distance between upper overtravel and the first obstruction point
    • Varies by hoist type and hoist speed (ranges between 5" - 8")
  • The factory set distance between the upper hard limit and upper overtravel
  • The recommended minimum distance between the upper soft limit and upper hard limit
    • ETC recommends a minimum of 3"
  • The height of any RACA, hanger bracket, turnbuckle, cable management system, etc.


  • Depending on the hoist and/or cable management configuration the first obstruction point may not be between the hanger bracket/RACA and the loft block.
  • Dead hang values may vary for non-ETC loft blocks, hanger brackets, and/or turnbuckles.
  • Please contact ETC Technical Services or your Project Manager for additional information.



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