Icicle Hitch
Friction on hardware · Physical hitch theory
Does not pick a knot
This page does not pick a knot for you. DNA, molecules, quantum braids and vortices stay off Decide.
Finished structure
No drawing of this exact knot yet. The written steps are the reference.
When this family fails, it fails as these. The recovered end still outranks the name.
Directional bite on a standing part — slide-test before you trust it.
- !Turns on the wrong side of the load
- !Failed slide-test, still used
- !A clove where a rolling or icicle third turn was the job
- !The turns run toward the pull instead of away from it, so the hitch slides when loaded.
- !The bight went over the rope parts but missed the end of the spar, so it pulls straight out when tightened.
- !It was loaded along the spar before being pulled tight, or tied with too few turns, and it slides as the load comes on.
- !The pull comes from the other direction along the spar, or the load comes off, and the hitch slides.
Turns toward the pull
Hitch will not grip and slides off
Turns must work away from the direction of pull · step 01
Bight missed the spar end
Unfinished icicle — dumps under along-spar load
The bight must pass over both ends and over the spar end · step 03
Never set perpendicular, or too few turns
Walks on the first along-spar load
Set perpendicular, then load; add a turn if the slide-test fails · step 04
Hitch slides down the standing part
Check
- ?Turns away from the pull
- ?Bight over both ends and the spar end
Then
- →Add a turn
- →Reset perpendicular, then load
Turns toward the pull
Check
- ?Hitch will not grip and slides off
- ?Inspect step 01
Then
- →Retie. Do not dress a defective structure and call it seated.
Bight missed the spar end
Check
- ?Unfinished icicle — dumps under along-spar load
- ?Inspect step 03
Then
- →Retie. Do not dress a defective structure and call it seated.
Never set perpendicular, or too few turns
Check
- ?Walks on the first along-spar load
- ?Inspect step 04
Then
- →Retie. Do not dress a defective structure and call it seated.
Same failure class, different geometry. Open the plates — Diagnose still starts from the symptom.
What holds it
- ·A hitch is object-dependent. Remove the spar, cleat, ring or pile and the structure is usually the unknot.
- ·Bayman / Maddocks–Keller describe a no-slip regime from wrap count and friction. The prediction is approximate, and only for hitches.
What topology does not predict
- ·Closed-loop knot invariants (Jones, Alexander) do not say whether a clove hitch will walk on a smooth spar.
- ·No manufacturer working load is implied by wrap count.
- ·Wet, iced, or HMPE covers change friction — topology is silent.
Not for
- ·Joining two free rope ends — that is a bend
- ·A standing loop that must survive after the object is gone
- ·A hitch you will adjust every minute (rolling hitch is faster)
- ·A two-way hold
Same pattern, different job
No sourced twin among these knots. Related knots stay on the Library card.
- Crowell — The physics of knots (Bayman / Maddocks–Keller) — Bayman 1977 hitch theory; Maddocks & Keller 1987 extension. No equally good general theory for all knots.
- Sano et al. — Inner workings of the clove hitch (Extreme Mechanics Letters, 2022) — Elastic rod on a rigid cylinder. Empirical hitch mechanics.
- Knot — practical vs mathematical (Wikipedia) — Closed-curve knot theory ignores friction. Practical knots are classified by function.
- Animated Knots — Icicle Hitch (end method)
- AnimatedKnots — How to Tie an Icicle Hitch (Rope End Method) — Cited tying video already attached to this record.