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Figure-of-eight knot

 
Figure of Eight Knot

 
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Figure-of-eight knot
 
 
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The figure-eight knot is a type of knot
Knot

A knot is a method for fastening or securing linear material such as rope by tying or interweaving. It may consist of a length of one or more segments of rope, string, webbing, twine, strap, or even chain interwoven such that the line can bind to itself or to some other object?the "load"....
. It is very important in both sailing
Sailing

Sailing is the art of controlling a boat with large pieces of canvas cloth called sails. By changing the rigging, rudder, and dagger or centre board, a sailor manages the force of the wind on the sails in order to change the direction and speed of a boat....
 and rock climbing
Rock Climbing

Rock climbing is a sport in which participants climb up or across natural Rock formations or man-made climbing wall with the goal of reaching the Summit of a formation or the endpoint of a pre-defined route....
 as a method of stopping ropes from running out of retaining devices.

Different types of figure-eight knots:






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The figure-eight knot is a type of knot
Knot

A knot is a method for fastening or securing linear material such as rope by tying or interweaving. It may consist of a length of one or more segments of rope, string, webbing, twine, strap, or even chain interwoven such that the line can bind to itself or to some other object?the "load"....
. It is very important in both sailing
Sailing

Sailing is the art of controlling a boat with large pieces of canvas cloth called sails. By changing the rigging, rudder, and dagger or centre board, a sailor manages the force of the wind on the sails in order to change the direction and speed of a boat....
 and rock climbing
Rock Climbing

Rock climbing is a sport in which participants climb up or across natural Rock formations or man-made climbing wall with the goal of reaching the Summit of a formation or the endpoint of a pre-defined route....
 as a method of stopping ropes from running out of retaining devices.

Different types of figure-eight knots:
  • Double figure-eight knot (figure-eight loop): used like an overhand loop
    Overhand loop

    The Overhand loop is a simple knot which forms a fixed loop in a rope. Made by tying an Overhand knot in the Bight , it can be tied anywhere along a rope ....
     knot. This type of knot can be used in prusik climbing when used in conjunction with a Swiss seat, a climbing rope, and locking carabiner
    Carabiner

    A carabiner or karabiner is a metal loop with a sprung or screwed gate. The loop part opposite the gate is referred to as the spine. It can quickly and reversibly connect components in safety-critical systems....
     designed for climbing, to ascend or descend with minimal equipment and effort.
  • Figure-eight splice knot: used to quickly and effectively splice together two ropes, not necessarily of equal diameter. This knot is tied starting with a loose figure eight knot on one rope (the larger-diameter one if unequal), and threading of the other rope's running end through the first figure eight, starting at the first figure-eight's running end and paralleling the path of the first rope through the figure eight until the second's ropes running end lies parallel against first's standing end. The result is two figure-eight knots, each partly inside the other and tightening its hold on the other when they are pulled in opposite directions. This can be a permanent or temporary splice. While it precludes the ropes' slipping relative to each other, it is a typical knot in having less strength than the straight ropes. A blood knot
    Blood knot

    A blood knot is most usefully employed for joining sections of monofilament line while maintaining a high portion of the line's inherent strength....
     is a better knot for rope splicing, but is more difficult to achieve.


See also

  • Figure-eight knot (mathematics)
    Figure-eight knot (mathematics)

    In knot theory, a figure-eight knot is the unique knot with a crossing number of four. This is the smallest possible crossing number except for the unknot and trefoil knot....
  • List of knots
    List of knots

    This list of knots includes many alternate names for common knots. Knot names have evolved over time and there are many conflicting or confusing naming issues....


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