The stairstep prusik

This system of climbing the rope uses a separate sling for each leg. You can make a set of slings for yourself, and 25 feet (about 8 meters) of 6-milli-meter accessory cord is plenty of material for both of them. Getting the size right requires some experimentation. When all the work is done, you should end up with two slings—one as long as the distance from your foot to your ears, the shorter one as long as from foot to elbow.

Each sling consists basically of a single strand of cord, tied with equal-sized loops (1 foot long or so) at each end. One will be the prusik loop, used in attaching the sling to the climbing rope with a prusik or Bachmann knot. The other is a foot loop, large enough to fit over any footwear, including crampons and overboots. Add a slip knot to this loop to prevent tightening down on the boot and cutting off circulation (fig. 13-7a-c).

You need to incorporate one little difference in the longer sling. Leave a 5-foot tail after you tie the loop that will be used for creating the prusik. Tie a small overhand loop at the end of this tail. When you use the slings, clip this small loop to your seat harness as a safety strap to catch you in case both feet slip out of the slings.

Before you head out onto a glacier, attach the prusik loops to the climbing rope so the slings are ready for immediate use in an emergency (fig. 13-7d,e). Attach them at a point beyond where the climbing rope leaves the carabiner at your chest harness, the longer sling attached beyond the shorter. (Pass the long sling through the chest carabiner as well.) Shove the other end of the long sling under the belt of your seat harness. Put the

Stopper knot can be moved up or down on the foot loop to change the size of the loop as needed to fit boots with crampons

Harness Chest ImprovisedTexas Prusik Sling

Fig. ¡3-7. The stair-step prusik: a, tying the foot loop with one half of a double fisherman s knot; b, climber prepared to walk out onto a glacier with prusik slings attached to climbing rope

Stopper knot can be moved up or down on the foot loop to change the size of the loop as needed to fit boots with crampons

Fig. 13-8. Ascending a rope using the stair-step prusik

Ascending Rope

Fig. 13-8. Ascending a rope using the stair-step prusik ends of both slings into your pockets, ready to be pulled out and slipped onto your feet when needed.

(If you are using mechanical ascenders instead of prusik loops to hold the sling to the rope, carry the ascenders on your seat harness and the slings in your pockets. After a crevasse fall, attach the ascenders to the rope.)

This is the sequence to follow if you need to climb the rope (fig. 13-8):

1. Take the foot loops from your pockets and slip thern over your boots, cinching up on the slip knots.

2. Stand up in the short prusik sling, putting all your weight onto it.

3. Lift the leg attached to the long prusik sling, then loosen the knot attached to that sling and slide it up the rope some 18 inches.

4. Stand up in the long sling, shifting all your weight to it.

5. Lift the leg attached to the short sling, then loosen the knot attached to that sling and slide it about 18 inches up the rope.

6. Stand up again in the short sling.

7. Keep repeating the process and you'll walk up the rope, somewhat as if it were a flight of stairs.

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Responses

  • Gildo
    How to stair step prusik?
    8 years ago
  • celendine
    Can you prussik with a sling?
    7 years ago
  • shirley
    Which knot do you use for foot loop?
    7 years ago
  • Genet
    How to attach a prusik into a harness?
    7 years ago
  • Saare
    How long for prusik slings?
    7 years ago
  • James
    How to climb rope using ascenders?
    7 years ago
  • Marco
    What is a seat prussik?
    7 years ago
  • selam
    How to ascend using stair step prusiks system?
    7 years ago
  • MARCO LABINGI
    How long should prusik slings be for texas?
    7 years ago
  • SAYID
    How long is a seat prussik?
    5 years ago
  • SELAMAWIT
    Where to put foot harness chest harness prusik?
    5 years ago
  • Piia
    How long should chest sling be for mountaineering?
    2 years ago
  • MAURA
    How to tie foot prusik for mountainering?
    5 months ago

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