Klemheist Knot
hitch knot
Life-safety notice
TyingPoint's illustrations are for learning. For any life-safety use — climbing, rope access, rescue, or load-bearing rigging — seek qualified in-person instruction, and always inspect and test every knot before you trust your weight (or anyone else's) to it.
Climbers who only have flat webbing on hand - no round accessory cord - still need a friction hitch that grips a rope reliably, and that's exactly the gap the klemheist fills. Where the classic prusik knot depends on round cord biting against round rope, the klemheist's wrapped, stacked construction cinches down under load regardless of whether the material is round cord or flat tubular webbing, making it the practical choice whenever webbing is what's available.
The tying method wraps a loop of cord or webbing around the climbing rope several times, working upward, then threads the two ends of the loop through each other in a finish similar to a girth hitch. Pulled snug, the stacked wraps grip the rope firmly under load while still sliding freely by hand when unloaded - the defining behavior of any friction hitch.
Its one real limitation compared with the prusik is directionality: the klemheist grips reliably when loaded from the direction it was dressed for, but can slip if the load comes from the opposite direction. That's a meaningful practical difference climbers need to account for when choosing which hitch to tie for a given situation - an ascending system loaded consistently in one direction suits the klemheist well; a use case where load direction might reverse favors the symmetric-gripping prusik instead.
Because it works equally well in cord or webbing, the klemheist is often the hitch climbers default to when building an improvised prusik loop from a spare sling rather than dedicated accessory cord - a genuinely common field situation where the alternative would be no friction hitch at all.
The number of wraps matters more here than with some other friction hitches: too few and the hitch can slip under a hard load, too many and it becomes stiff and difficult to slide by hand when unweighted. Most climbers settle on three to five wraps depending on the relative diameters of the loop material and the rope, adjusting by feel and a quick test-load before committing real weight to the system.
Because its grip comes from stacked wraps cinching together rather than a woven cord biting into a rope's surface texture, the klemheist also tends to be gentler on the rope's sheath over repeated use than some more aggressive friction hitches, which is a minor but genuine consideration for anyone using the same section of rope for many ascents in a single day.
How to tie the Klemheist Knot
Lay a loop of cord or webbing alongside the climbing rope, with the loop's join near the bottom.
Strength & security
Unlike the prusik, the klemheist grips reliably even when tied with flat webbing rather than round cord, since its wraps stack and cinch under load rather than depending on round-cord-to-round-rope friction - a genuine practical advantage for climbers who only have webbing on hand.
Cautions: It only grips in one direction - the direction the wraps were loaded toward - and can slip if pulled from the other end, unlike the prusik or autoblock, which grip symmetrically in either direction.
Alternatives
- Prusik Knot
Grips symmetrically in either direction and is the more universally taught friction hitch, though it needs round cord rather than flat webbing to grip reliably.
- Autoblock Knot
Easier to release under load than either the klemheist or the prusik, which matters most for a rappel backup rather than pure ascending.
FAQ
Why choose the klemheist instead of a prusik?
It grips reliably even when tied with flat webbing instead of round cord, which the prusik doesn't do as well - useful whenever webbing is what's actually on hand.
Does the klemheist grip in both directions like a prusik?
No - it grips reliably in the direction it was loaded and dressed for, and can slip if pulled from the opposite direction, unlike the prusik or autoblock.
Can the klemheist be tied with a climbing sling instead of dedicated cord?
Yes - that's one of its main practical advantages, since a spare sling works fine where a prusik would need actual round accessory cord to grip reliably.
Should the wrap count change between cord and webbing versions of the klemheist?
Often yes - flatter, wider webbing tends to need fewer passes to build an equivalent grip than thinner round cord does, since each webbing wrap covers more surface area against the rope; testing the specific material in hand before trusting a wrap count from memory is the safer habit.