Figure-eight loop (also figure-eight on a bight, figure-eight follow-through, figure-eight retrace, Flemish loop, or Flemish eight) is a type of

knot A knot is an intentional complication in cordage which may be practical or decorative, or both. Practical knots are classified by function, including hitches, bends, loop knots, and splices: a ''hitch'' fastens a rope to another object; a ' ...

created by a

loop Loop or LOOP may refer to: Brands and enterprises * Loop (mobile), a Bulgarian virtual network operator and co-founder of Loop Live * Loop, clothing, a company founded by Carlos Vasquez in the 1990s and worn by Digable Planets * Loop Mobile, an ...

on the

bight The word is derived from Old English ''byht'' (“bend, angle, corner; bay, bight”). In modern English, bight may refer to: * Bight (geography), recess of a coast, bay, or other curved feature * Bight (knot), a curved section, slack part, or loo ...

. It is used in

climbing Climbing is the activity of using one's hands, feet, or any other part of the body to ascend a steep topographical object that can range from the world's tallest mountains (e.g. the eight thousanders), to small boulders. Climbing is done fo ...

and

caving Caving – also known as spelunking in the United States and Canada and potholing in the United Kingdom and Ireland – is the recreational pastime of exploring wild cave systems (as distinguished from show caves). In contrast, speleology i ...

. The double figure eight is used to put a loop in the end of a rope, or around an object. It is relatively easy to tie and is secure, but can become difficult to untie after heavy loading, and can jam badly in any rope type.

Tying methods

On a bight

A figure-eight loop is created by doubling the rope into a bight, then tying the standard

figure-eight knot The figure-eight knot or figure-of-eight knot is a type of stopper knot. It is very important in both sailing and rock climbing as a method of stopping ropes from running out of retaining devices. Like the overhand knot, which will jam under st ...

. In climbing, this knot is used to save time when repeatedly attaching the rope to climbing harnesses, using locking carabiners, such as when a group of people are climbing on the same top-rope.

Follow-through

Alternatively, to tie the knot directly around an object, the follow-through method must be used. * Tie a regular figure eight knot with a significant amount of extra tail. * Loop the tail around the object. * Thread the tail back through the figure eight to create a normal looking figure eight on a bight.

Climbing

This is the standard method for attaching a rope to a climbing harness. Often an additional

strangle knot The strangle knot is a simple binding knot. Similar to the constrictor knot, it also features an overhand knot under a riding turn. A visible difference is that the ends emerge at the outside edges, rather than between the turns as for a constr ...

(which is half of a

double fisherman's knot The double fisherman's knot or grapevine knot is a bend. This knot and the triple fisherman's knot are the variations used most often in climbing, arboriculture, and search and rescue. The knot is formed by tying a double overhand knot, in its ...

) "backup knot" is tied in the tail the figure 8. This is not required for the knot's integrity during climbing, but could prevent ring-loading failure if

belaying Belaying is a variety of techniques climbers use to create friction within a climbing system, particularly on a climbing rope, so that a falling climber does not fall very far. A climbing partner typically applies tension at the other end of th ...

from the rope loop (instead of a dedicated belay loop). It also ensures that adequate tail length has been included, and gets excess tail out of the way. If the finish knot is not included, the tail should be 4 to 8 inches long. The tail can also be tucked back into the knot, called a "

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finish" or "Yosemite tuck". This holds the bottom loop open, making the knot easier to untie after falling, but also making it weaker in a ring-loading configuration. The diameter of the loop should be kept small, to avoid being caught on protrusions while falling, or clipped into accidentally while

lead climbing Lead climbing is a climbing style, predominantly used in rock climbing. In a roped party one climber has to take the lead while the other climbers follow. The ''lead climber'' wears a harness attached to a climbing rope, which in turn is connecte ...

. A well-dressed knot has a

symmetrical Symmetry (from grc, συμμετρία "agreement in dimensions, due proportion, arrangement") in everyday language refers to a sense of harmonious and beautiful proportion and balance. In mathematics, "symmetry" has a more precise definiti ...

appearance, with the strands parallel through each curve.

References

External links