How to Tie the Sheepshank
The Sheepshank
The Sheepshank is a shortening knot used to temporarily reduce the length of a rope without cutting it. It is commonly used in camping, sailing, rigging, and general rope work when a section of rope is damaged or when excess length needs to be taken up under light load. The knot works by folding the rope back on itself and securing the two standing sections so the shortened middle portion is held in place.
Other Names: Dogshank
Sheepshank Knot Instructions
Before analyzing the Sheepshank in depth, understand that the most appropriate use for this knot are temporaory situations with very light load or no load, such as bundling your rope on the boat deck, etc. Even for a situation similar to just mentioned, there are better knots. With that said, the Sheepshank is a classic loop knot that builds the foundation as to how hitches can work with each other since the Sheepshank utilizes two single hitches to its advantage.
The Sheepshank is listed in The Ashley Book of Knots (ABOK #6) and is recognized as a classic rope-shortening knot rather than a bend or loop. Its structure relies on creating two opposing half hitches or loops that hold the doubled rope segments in tension, keeping the shortened section stable while the knot is under load. It is best suited for situations with steady, moderate tension and is not reliable under slack or fluctuating loads.
See the Alpine Butterfly Loop, Dropper Loop on a Rope, or Double Alpine Butterfly for displacing a section of your rope instead of the Sheepshank.
Key Considerations
Proper dressing of the Sheepshank is important to ensure the shortened sections are equal and the securing hitches are properly tightened. If the knot is not held under tension, it can collapse and come undone, so it is typically used only when the rope will remain loaded during use. Reinforced versions, such as those using additional locking methods, are often preferred for improved security.
Advantages & Disadvantages
One of the key advantages of the Sheepshank is its ability to quickly shorten a rope without requiring cutting or re-termination. It can be tied and adjusted relatively quickly and then removed just as easily when no longer needed. Despite its usefulness in temporary situations, it is generally considered a specialized knot because it relies on continuous tension to remain secure.
When the rope goes slack, the Sheepshank can easily come undone, and the knot fails. For displacing a fray, or shortening a small amount of rope, see the Alpine Butterfly Loop.
ABOK #6 - Sheepshank
ABOK Numbers: Abok #6, Abok #1152, Abok #1153, Abok #1154, Abok #1158, Abok #1159, Abok #1160
The Sheepshank nearly takes up an entire page in Ashley’s Book of Knots with its variations and all. Page 210 is where you can read about it in full; Clifford Ashley presents better alternatives to the traditional Sheepshank on this page. Here are some of the traditional write-ups as they were:
Abok #1152,
There are two practical ways of tying the Sheepshank Knot. The slack in the rope may be laid out on deck in three parallel parts, forming two bights as in the first diagram of
Abok #1146,
A Half Hitch is formed in the standing part and placed over the end of one of the bights. Then the other bight is treated likewise. This is the preferred way for large rope.
Abok #1153,
In light rope the three parallel parts of the Sheepshank Knot are laid out as before, the upper bight is grasped in the right hand, laid across the standing part of the rope and then given a turn which picks up a hitch exactly in the same way that is employed in tying a Bowline Knot. This is repeated with the lower end.
Abok #1154,
If a Sheepshank Knot is to be tied around a wounded or chafed part of a rope it should be arranged so that the weak point will be where X is marked on the accompanying drawing. Sometimes this knot is employed as a “trick” and the rope is cut at X. Under steady pull, even when cut, the knot is reasonably secure.
Abok #1158,
The common Sheepshank, if carefully tied and drawn up kept at even tension, is fairly dependable, but it should be examined after each haul or lift, and if it is to remain in place any considerable length of time it should be stopped. This is usually done as
shown alongside.
Abok #1159,
Perhaps a better way to secure the Sheepshank is to include only two parts and to add crossing turns to the seizings. Arranged in this way, the knot will be safe.
Abok #1160,
In heavy material a Sheepshank may be toggled. Slightly tapering fids should be driven in and these in turn should be secured
by taking belaying turns of marline around the two ends. If the fids
are notched at the center the knot will be safer.
Disclaimer
The information on this website is provided for educational and informational purposes only. While every effort has been made to ensure accuracy, knot strength, security, and suitability can vary depending on rope type, condition, load, environmental factors, and how the knot is tied. Users are responsible for inspecting their equipment and verifying that a knot is appropriate for their intended use. Do not rely solely on the information provided here for activities involving personal safety, life support, climbing, rescue operations, heavy lifting, or other high-risk applications.
SCB Media Group assumes no responsibility or liability for any injury, loss, damage, or consequences resulting from the use or misuse of the knots and techniques described. Always seek professional instruction and follow applicable safety standards where appropriate.