Lashing (ropework)

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Bamboo scaffolding secured with lashings in Kowloon. Temple St. bamboo scaffolding 2.JPG
Bamboo scaffolding secured with lashings in Kowloon.

A lashing is an arrangement of rope, wire, or webbing with linking device used to secure and fasten two or more items together in a somewhat rigid manner. Lashings are most commonly applied to timber poles, and are commonly associated with cargo, containerisation, the Scouting movement, and sailors.

Contents

It has been imagined that the first lashing made by humans was wrapping a few strips of bark around a stone to hold it to a tree branch to make an ax to hunt and build with.[ citation needed ] In modern times, the same methods are used, but strips of bark and vines have been replaced with natural and synthetic fiber ropes. Scouts and campers use lashings to build camp gadgets and improve their campsites for comfort and convenience, including the building of rafts for transport and competitive events. Lashings are also used in pioneering, the art of creating structures such as bridges and towers, using ropes and wooden spars.

There are still areas in the world where lashing spars (or poles) is the basic means of building.[ citation needed ]

A square lashing binding a wooden spar to a tree trunk. The rope turns between the tree and spar are the frapping. Square lashing with piece of wood.JPG
A square lashing binding a wooden spar to a tree trunk. The rope turns between the tree and spar are the frapping.

Types

Square lashing

Square lashing is a type of lashing used to bind spars together, at right angles to one another. There are different types, but all consist of a series of wraps around the spars, and frapping around the line running between the spars.

Diagonal lashing

Diagonal lashing is a type of lashing used to bind spars or poles together, to prevent racking. It gets its name from the fact that the wrapping turns cross the poles diagonally and is used to spring poles together where they do not touch as in the X-brace of a trestle. [1]

Shear lashing

Shear lashing (two-spar shear lashing) also spelled "sheer lashing" is used for lashing together two parallel spars which will be opened out of the parallel to form sheer legs as in the formation of an A-frame. The clove hitch is tied around one leg only and frapping turns are taken between the poles. [2]

Round lashing

The round lashing is most frequently used to join two poles together to extend their length. Typically, two lashings are used a reasonable distance apart for extra strength. In the simple version, a clove hitch is tied around both poles and there are no frapping turns. [3]

The nautical term gammon means a round lashing of rope or iron hardware to attach a mast to a boat or ship. [4]

Tripod lashing

The tripod lashing (also known as gyn lashing, figure of eight lashing, and three-spar shear lashing) is used to join several spars together to form a self supporting structure. If the lashing is tied around three spars, then the structure is called a tripod, but quadpods can also be made by using four spars.

See also

Related Research Articles

<span class="mw-page-title-main">Knot</span> Method of fastening or securing linear material

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 bend fastens two ends of a rope to each another; a loop knot is any knot creating a loop; and splice denotes any multi-strand knot, including bends and loops. A knot may also refer, in the strictest sense, to a stopper or knob at the end of a rope to keep that end from slipping through a grommet or eye. Knots have excited interest since ancient times for their practical uses, as well as their topological intricacy, studied in the area of mathematics known as knot theory.

<span class="mw-page-title-main">Constrictor knot</span> Binding hitch knot

The constrictor knot is one of the most effective binding knots. Simple and secure, it is a harsh knot that can be difficult or impossible to untie once tightened. It is made similarly to a clove hitch but with one end passed under the other, forming an overhand knot under a riding turn. The double constrictor knot is an even more robust variation that features two riding turns.

<span class="mw-page-title-main">Clove hitch</span> Type of knot

The clove hitch is an ancient type of knot, made of two successive single hitches tied around an object. It is most effectively used to secure a middle section of rope to an object it crosses over, such as a line on a fencepost. It can also be used as an ordinary hitch, or as a binding knot, but it is not particularly secure in either application. It is considered one of the most important knots, alongside the bowline and the sheet bend.

Although the name clove hitch is given by Falconer in his Dictionary of 1769, the knot is much older, having been tied in ratlines at least as early as the first quarter of the sixteenth century. This is shown in early sculpture and paintings. A round turn is taken with the ratline and then a hitch is added below. The forward end is always the first to be made fast.

A whipping knot or whipping is a binding of marline twine or whipcord around the end of a rope to prevent its natural tendency to fray.

<span class="mw-page-title-main">Taut-line hitch</span> Adjustable hitch knot

The taut-line hitch is an adjustable loop knot for use on lines under tension. It is useful when the length of a line will need to be periodically adjusted in order to maintain tension. It is made by tying a rolling hitch around the standing part after passing around an anchor object. Tension is maintained by sliding the hitch to adjust the size of the loop, thus changing the effective length of the standing part without retying the knot.

<span class="mw-page-title-main">Pioneering (scouting)</span>

Pioneering is the art of using ropes and wooden spars joined by lashings and knots to create a structure. Pioneering can be used for constructing small items such as camp gadgets up to larger structures such as bridges and towers. These may be recreational, decorative, or functional.

<span class="mw-page-title-main">Sheet bend</span> Type of knot

The sheet bend is a bend. It is practical for joining lines of different diameter or rigidity.

<span class="mw-page-title-main">Cow hitch</span> Type of knot

The cow hitch, also called the lark's head, is a hitch knot used to attach a rope to an object. The cow hitch comprises a pair of single hitches tied in opposing directions, as compared to the clove hitch in which the single hitches are tied in the same direction. It has several variations and is known under a variety of names. It can be tied either with the end of the rope or with a bight.

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Bushcraft is the use and practice of skills and the development of knowledge to survive and thrive in a natural environment.

<span class="mw-page-title-main">Rolling hitch</span> Knot used to attach a rope to a rod, pole, or another rope

The rolling hitch is a knot used to attach a rope to a rod, pole, or another rope. A simple friction hitch, it is used for lengthwise pull along an object rather than at right angles. The rolling hitch is designed to resist lengthwise movement for only a single direction of pull.

<span class="mw-page-title-main">Two half-hitches</span> Type of knot

Two half-hitches is a type of knot, specifically a binding knot or hitch knot. One variety consists of an overhand knot tied around a post, followed by a half-hitch. This knot is less often referred to as a clove hitch over itself, double half-hitch, or full-hitch.

Two half hitches is the commonest of all hitches for mooring in particular and also for general utility. Steel gives the name in 1794. The difference between two half hitches and the clove hitch is that the former, after a single turn around a spar, is made fast around its own standing part, while the latter is tied directly around the spar.

<span class="mw-page-title-main">Sailmaker's whipping</span>

The sailmaker's whipping is one of the most durable and stable of rope whippings known. According to The Ashley Book of Knots, "palm-and-needle whipping, or sailmaker's whipping, is the most satisfactory of all."

The magnus hitch is a knot similar to a rolling hitch or clove hitch, used to tie a rope or line to a pole, spar, or another line. It is tied similarly to a rolling hitch but with the final hitch in the opposite direction. It can be more tricky to snug up, since both lines emerge from the same side of the hitch, but it has less tendency to twist under load.

A gyn is an improvised three legged lifting device used on sailing ships. It provides more stability than a derrick or sheers, and requires no rigging for support. Without additional support, however, it can only be used for lifting things directly up and down. Gyns may also be used to support either end of a ropeway.

<span class="mw-page-title-main">Snuggle hitch</span> Type of knot

The snuggle hitch is a modification of the clove hitch, and is stronger and more secure. Owen K. Nuttall of the International Guild of Knot Tyers came up with this unique hitch, and it was first documented in the Guild's Knotting Matters magazine issue of January, 1987. Generally, hitches are used to attach a line to another rope or spar, pole, etc., and are usually temporary. Thus, they should be relatively easy to untie.

<span class="mw-page-title-main">Ossel hitch</span> Type of knot

The ossel hitch is a knot used to attach a rope or line to an object. It was originally used on Scottish gill nets to tie small line to larger rope that supported the net. Ossel is actually the Scottish word for "gill net" and for the line attaching the net to the float rope.

<span class="mw-page-title-main">Pipe hitch</span> Type of knot

A pipe hitch is a hitch-type knot used to secure smooth cylindrical objects, such as pipes, poles, beams, or spars. According to The Ashley Book of Knots, a pipe hitch is "used to lower a pipe or hoist one" and as "another method of tying to a rectangular timber."

<span class="mw-page-title-main">Swing hitch</span> Type of knot

Swing hitch is a way to tie a swing rope to a branch or other horizontal beam. Ashley describes it in ABOK as "... firm, strong, secure, and easily untied once the load has been removed."

References

  1. Green, Larry (14 December 2014). "Traditional Diagonal Lashing". scoutpioneering.com.
  2. Green, Larry (14 October 2013). "The Somewhat Ambiguous Shear Lashing".
  3. Green, Larry (27 January 2014). "Four Different Lashings to Extend the Length of a Spar".
  4. "Gammon lashing". Oxford Reference. Retrieved November 26, 2022.