Litter Hauling Techniques Using Dual Capacity or Twin Tension Rope Systems Part 3: Via A Two Rope Offset

Written By: Lance Piatt

Two Rope Offset Systems or “cross hauling” uses two identical working systems (normally).  Now while some use a main-belay system, we are advocating a “two tension system” as it “halves” the amount of tension on both sides respectively, thus reducing the chances of any load related challenges… I am purposely not using the term “catastrophic failure” as (in my opinion) it has been dramatically overused… but I do admit it drives the point home very quickly.

Both systems work synergistically together where either side is in hauling mode and the other is lowering mode in order to position the litter or rescue package in the proper alignment, direction and or path.

Many would say that “Two Rope Offsets” are similar to “drooping highlines” and while they share common characteristics… a drooping highline by definition is set up as highline and two rope offsets are not rigged as highlines; they simply will never see the loads a highline will see… drooping or not.

Two rope offsets of many benefits over highlines and some of these are:

  • Vector forces are lower with a Two Rope Offset (deep Vs equal a narrower angle or “catenary angle”).
  • Quicker to set up.
  • Span gaps more efficiently.
  • Transferring patients is easier.
  • Well suited for pickoffs.

Offsets include a variety of “methods, set ups or techniques”… and a Two Rope system is one of six.  Rigging Lab Academy has courses and tutorial on all of these systems… so check in on any or all of them as they are well worth the time and effort to do so.

  1. Tagline
  2. Guiding Line
  3. Tracking Line
  4. Skate Block
  5. Deflected or Dynamic Directional
  6. Two Rope

Two Rope Offsets should be considered long before determining a highline set up.  Offsets could serve as the 90% solution for just about all the “spanning the gap” jobs.  Straight up and down rescues (served through two tension systems or not) now have a mirrored technique.  The system serves both sides equally and can be mirrored.  Artificial or Natural High Directionals are generally needed.  Stay with the system you have in place and double it on the other side.  Now I understand it isn’t quite that simple, but you get the point right?

So lets do this!  We are working on a brand new course and yes… this is a teaser.  In the coming weeks you’ll be see more on this unique and monumental “first ever” course.

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Peace on your Days…
Lance

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