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Knot List: Klemheist Knot (Machard) ‐ Step-by-Step

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Klemheist Knot (Machard), Showing Name
Klemheist Knot (Machard), Step-by-Step Animation

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Klemheist (Machard) Knot Tying

Use a piece of cord formed into a loop. Pass the loop around the main rope. Make three complete turns, laying each turn on neatly. Pass the rest of the cord through the loop and pull it back down in the direction of the expected load.
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Klemheist (Machard) Knot Details

Pictures of The Prusik Knot
The Prusik Knot

The Prusik Knot

History: The Klemheist, or Machard Knot, is a derivative of the original Prusik knot. It also appears to be identical to the knot described by Ashley for securing a loop to a vertical pole (ABOK # 1762, p 299). However, Ashley did not name this knot and did not describe the slide and grip feature.

Structure: The knot requires a "Prusik Loop" which is constructed by joining the two ends of a length of rope using a Double Fisherman's or a Triple Fisherman's.

Slide and Grip Knots: There is a large family of "Slide and Grip" knots. It is not practical to show them all. The Klemheist is a good example of a knot intended for a load in one direction only. There are two well known related one-direction knots:

Pictures of The Autoblock Knot
The Autoblock Knot

The Autoblock Knot

The Autoblock (French Prusik, or Machard Tresse) employs a carabiner to join the two ends of the loop. This can be valuable in a rescue if it is necessary to release the knot while still loaded. Never grip the knot to apply load as this can initiate slipping.

Pictures of The Bachmann Hitch
The Bachmann Hitch

The Bachmann Hitch

The Bachmann Hitch performs a similar function but incorporates the locking carabiner into the hitch. Here the warning is the reverse: never grip the carabiner to apply load as this can initiate slipping.

Variations: With these knots the number of turns should be increased or decreased to suit the ropes and the conditions, i.e., before using any Slide and Grip knot, test it to see that it both grips and releases well.

Rope Size: These knots must be made using a rope smaller than the load bearing rope, e.g., 5 or 6 mm cord around the climbing rope. The effectiveness of these knots diminishes as the sizes of the two ropes approach each other.

Disclaimer: Any activity that involves ropes is potentially hazardous. Lives may be at risk - possibly your own. Considerable attention and effort have been made to ensure that these descriptions are accurate. However, many critical factors cannot be controlled, including: the choice of materials; the age, size, and condition of ropes; and the accuracy with which these descriptions have been followed. No responsibility is accepted for incidents arising from the use of this material.

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