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| isolating single
strands w/ figure eight |
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Purpose: To
isolate single strands on an existing double
strand rappel rigging.
Application:
Increases efficiency when moving large groups
through canyons. The next descender may thread
their rappel device and ready themselves to
descend on a single strand while another canyoneer
is rappeling on the other line.
Fig. 1. Thread the rope as you normally
would for a double line rappel through the
rapide. Clip a locking biner to the rapide
as shown.
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| Fig. 2. Grasp
the two strands together and pull a bight
through the wide mouth of the figure eight. |
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Fig. 3. Pull
the double strand bight over the small head
of the figure eight. Clip the locking carabiner
through the large mouth of the figure eight.
You are now ready to rappel from each strand
as isolated single strands.
Special
Note: In order to assure the ability
to release either strand for belaying/lowering
purposes, make certain that the rope is running
through the rapide above the carabiner,
rather than below it or next to it as shown
in this photo. If the rope is positioned beneath
the locking carabiner, it will pinch when
the strands are weighted. It is also important
to make sure the strands do not twist as they
run through the figure 8, as this could also
prohibit the contingency option from being
utilized. |
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| Fig. 4. To
lower a trapped person on one of the strands,
pull the opposite strand's bight back over
the small head of the carabiner and use this
strand to lower the person trapped on the
opposing strand. |
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| Fig. 5: In
instances where having a releasable rigging
is not important, grasp both strands and pull
a bight of rope through the large hole, twist,
and seat the bight over the small head of
the figure eight. Clip a locking carabiner
into the small hole of the eight and to the
double strands as a safety. The advantage
of this method is that it can be rigged at
any point along the rope, versus the former
method which must be rigged at the anchor.
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| All material © Cerberus
Canyons, LLP 2004-2005 | Disclaimer
| Contact
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