Prusik Knot

Description

The Prusik knot is a friction hitch that grips the main rope when loaded but slides easily when unloaded. It is tied by wrapping a smaller-diameter cord around a larger main rope multiple times. The number of wraps determines the gripping strength.

Common Uses

Essential in climbing and mountaineering for ascending ropes, creating self-belay systems, and setting up rope ascending or traversing systems.

When to Choose This Knot

Choose this knot only in the context of proper climbing instruction, inspected equipment, and a complete safety system. Climbing knots are not isolated tricks; they interact with harnesses, carabiners, anchors, belay devices, and partner checks.

Safety Notes

• Use professional instruction and follow the standards of your climbing gym, guide, rescue team, or local authority.
• Perform a partner check before every load-bearing use.
• Retire damaged rope and never experiment with unverified knots at height.

How to Tie

1. 1Form a loop with a cord (a prusik loop) and place it behind the main rope.
2. 2Pass the loop through itself twice or three times.
3. 3Dress the wraps so they lie flat and parallel against the main rope.
4. 4Pull the loop to seat the wraps snugly.
5. 5Test that the knot grips when loaded and slides when relaxed.

Common Mistakes

• Practicing the knot correctly once and then skipping inspection under real conditions.
• Using the wrong carabiner orientation or anchor geometry.
• Replacing supervised training with a web article.

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