| Sheepshank | |
|---|---|
 An unloaded sheepshank tied in nylon rope | |
| Category | Shortening |
| Origin | 1627[1] |
| Related | Catshank,Dogshank, Bell-ringer's knot |
| Releasing | Non-jamming |
| Typical use | Provides loops, shortens or removes slack from a rope, bypasses a frayed section of rope |
| Caveat | Spills if not under tension |
| ABoK | #1152, #1153, #1154, #1158, #1159, #1160 |
| Instructions | [1] |
Ashank is a type ofknot that is used to shorten arope or take up slack, such as thesheepshank. The sheepshank knot is not stable. It will fall apart under too much load or too little load.
The knot has several features which allow a rope to be shortened:
A sheepshank knot may be constructed as follows: ...
An alternative method for quickly constructing a sheepshank is as follows:
The result is a flattened loop which is held at each end by ahalf hitch. If the sides of the flattened loop are pulled away from each other, the flattened loop ends pull out of the half hitches and the knot falls apart, but if the free endsare pulled taut then the knot remains secure.
Sheepshank knots are typically used for securing loads to trucks ortrailers, and insailing applications.
The sheepshank was developed before the use of modern "slippery"synthetic ropes. Constructed from such ropes, under load, it can fail. It is strongly advised that an alternative knot be used.
Theman-o'war sheepshank is a sheepshankknot with aHandcuff knot in the middle. This configuration with the half-hitches formed close to the central knot is used inrope rescue and is called aFireman's chair knot.
This version of the sheepshank is tied by using slipknots instead of half-hitches. It is one of the safest sheepshank variations.[2]
The kamikaze knot is a slight variant of the sheepshank. To perform a kamikaze knot, a sheepshank is first constructed. While holding sufficient tension on the sheepshank so it will not slip out, the middle rope is sliced. This allows climbers rappelling down cliff faces to keep most of the rope used for the rappel, by tying the knot at the top, and shaking the rope when they reach the bottom. The shaking disconnects the knot at the top, allowing the longer section of rope to fall, meaning only a small amount of rope is retained by the anchor at the top of the cliff. Thin or slippery rope is unsuitable for such a knot, as it can easily slip, and the knot should not be performed unless desperately needed.
This variant of the sheepshank knot appeared in an episode of the TV showMan vs. Wild. Although certainly not invented by him,Bear Grylls usesa modification of this knot[clarify] by cutting one of the lengths of rope in the knot, whilerappelling down an edge during the Ireland episode ofMan Vs Wild in order to retrieve his rope at the bottom by severing the middle leg of the sheepshank knot before his descent. He refers to it as a "Kamikaze" knot.
A simpler variant of the sheepshank wherein a half-hitch is only tied around only one end produces abell-ringer's knot (ABoK #1147). It will immediately spill under tension, and is used to keep a long rope from the belfry deck when not in use.
| Catshank | |
|---|---|
 | |
| Category | Shortening |
| Related | Sheepshank,Dogshank |
Thecatshank is a variant of the sheepshank, clinched by twooverhand knots with thebights passed through the twists (one end of the rope must be available to tie the overhands).[3]
| Dogshank | |
|---|---|
 | |
| Category | Shortening |
| Related | Sheepshank,Catshank,Bowline |
| Typical use | Shortening rope |
Thedogshank, orsheepshank pouch knot, is a variant of the sheepshank where the eyes formed at each end have the ends of the rope passed through them to prevents the knot from spilling. At least one end of the rope must be available to tie or untie this knot. It is mostly useful for the hammock-like space it creates.[4]
Thedogshank can be thought of as two oppositebowlines where
