Braid 230643 224486838 2008-07-09T01:48:03Z Squids and Chips 2947772 Disambiguate [[Hose]] to [[Hose (tubing)]] using [[:en:Wikipedia:Tools/Navigation_popups|popups]] {{otheruses}} {{unreferenced|date=December 2007}} [[Image:Renoir La Natte.jpg|right|thumb|"The braid" (1887) by [[Auguste Renoir]].]] A '''braid''' (also called '''plait''') is a complex structure or pattern formed by intertwining three or more strands of flexible material such as textile fibers, wire, or human hair. Compared to the process of [[weaving]] a wide sheet of [[cloth]] from two separate, perpendicular groups of strands ([[warp]] and [[weft]]), a braid is usually long and narrow, with each component strand functionally equivalent in zigzagging forward through the overlapping mass of the others. The simplest possible braid is a flat, solid three-strand structure. More complex braids can be constructed from an arbitrary (but usually odd) number of strands to create a wider range of structures: wider [[ribbon]]-like bands, hollow or solid cylindrical cords, or broad mats which resemble a rudimentary perpendicular weave. Braids are commonly used to make [[rope]], decorative objects, and hairstyles (also see [[pigtails]]). Complex braids have been used to create hanging fiber artworks. ==Ropes and cables== [[Image:Braid StepBystep.jpg|right|thumb|A step by step creation of a basic braid using three strings.]] Braiding creates a composite [[rope]] that is thicker and stronger than the non-interlaced strands of [[yarn]]. Braided ropes are preferred by [[arborist]]s and [[rock climbing|rock climber]]s because they do not twist under load, as does an ordinary twisted-strand rope. These ropes consist of one or more [[concentric]] tubular braided jackets surrounding a single untwisted yarn of straight fibers. In electrical and electronic [[cable]]s, ''braid'' is a tubular sheath made of braided strands of metal placed around a central cable for shielding against [[electromagnetic interference]]. The braid is grounded while the central conductor(s) carry the signal. Flat braids made of many copper wires are also sometimes used for flexible electrical connections between large components. The numerous smaller wires comprising the braid are much more resistant to breaking under repeated motion and vibration than is a cable of larger wires. Similar braiding is used on pressurized [[rubber]] [[Hose (tubing)|hose]]s, such as in [[plumbing]] and [[hydraulic]] [[brake]] systems in [[automobiles]]. Braiding is also used for fibres for composite reinforcements. ==Other braids== A '''gold braid''' and '''silver braid''' are components or trims of many kinds of [[formal dress]], including [[military uniform]] (in [[epaulette]]s, [[aiguillette]]s, on headgear). ==Metaphors== [[Image:Braided_Stream_FairbanksTananaRiver.jpg|right|thumb|The braided streams of the [[Tanana River]].]] Braids are often used figuratively to represent interweaving or combination, such as in "He braided many different ideas into a new whole." Braiding happens when a river is carrying vast amounts of eroded sediment. Sediment is deposited as islands in the channel causing the river to split up into many winding channels. In some river and stream systems, small streams join together and redivide in many places. Such stream systems are said to be [[Braided river|braided]]. These are often found in [[alluvial fan]]s at the outlet of [[canyon]]s. This is a result of heavy [[sediment]] deposition at high flows followed by re-erosion at low flows. See also [[river delta]]. There is also a mathematical [[braid theory]] which is closely connected with [[knot theory]], both being subfields of [[topology]]. ==Gallery== <gallery> Image:Braid final rot.jpg|A braid. Image:RG-59.jpg|A [[Coaxial cable]] with braided [[copper]] wire [[electromagnetic interference|EMI]] shielding (B). Image:Gold braid with star.JPG|A gold braid on a Police uniform. </gallery> ==See also== *[[French braid]] *[[Kumihimo]], Japanese braid [[Category:Braids| ]] [[Category:Cables]] [[Category:Needlework]] [[Category:Hairstyles]] [[Category:Ropework]] [[Category:Knots]] [[ay:K'ana]] [[cs:Splétání textilních materiálů]] [[de:Flechten (Tätigkeit)]] [[es:Trenza]] [[fr:Tresse]] [[it:Treccia]] [[nl:Vlecht]] [[no:Flette]] [[ja:組み紐]] [[pt:Nó de trança]] [[scn:Trizza]] [[fi:Letti]] [[sv:Fläta]]