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A Gunter's chain showing the individual links. The link (usually abbreviated as "l.", "li." or "lnk."), sometimes called a Gunter’s link, is a unit of length formerly used in many English-speaking countries. In US customary units modern definition, the link is exactly 66 ⁄ 100 of a US survey foot, [1] or exactly 7.92 inches or 20.1168 cm.
Had passenger and freight lines, see Rail transport in Jordan: 400 Kiribati: Had industrial lines 296 Lebanon: Had from 1890 until 1970 (future projects to build a railway from Tyr to Tripoli) 422 Libya: 1912 to 1965 (peak length of 399 km [15]); (network under construction in 2008–2011, but works stopped, see Libyan Railways) 434 Malta
One link is a hundredth part of a chain, which is 7.92 inches (20.1168 cm). [7] The surveyor's chain first appears in an illustration in a Dutch map of 1607, [8] and in an English book for surveyors of 1610. [9] In 1593 the English mile was redefined by a statute of Queen Elizabeth I as 5,280 feet, to tie in with agricultural practice.
The centre of the buffer on European railway vehicles must be between 940 and 1,065 mm above the top of rail. Spain was an exception for a long time. A buffer separation of 1,950 mm was specified there because of the force transmitted to the longitudinal beams of the wagons, which are further apart due to their broad gauge railways.
Narrow gauge flat wagons, 750 mm (2 ft 5 + 1 ⁄ 2 in).Note the single buffer with a hook on the right side and a chain on the other. On some narrow-gauge lines in Europe, and on the Paris Metro, a simplified version of the loose-coupler is used, consisting of a single central buffer with a chain underneath.
Although link chains were later superseded by the steel ribbon tape (a form of tape measure), its legacy was a new statutory unit of length called the chain, equal to 22 yards (66 feet) of 100 links. [8] This unit still exists as a location identifier on British railways, as well as all across America in what is called the public land survey ...
The contiguous rail network in North America has a minimum width of 3,250 mm (10 ft 8 in) and a minimum height of 4,620 millimetres (15 ft 2 in). The standard gauge rail network in Eastern Asia is built to a minimum width of 3,400 millimetres (11 ft 2 in), and the Chinese CRH2 as well as the Japanese 0 Series Shinkansen have a width of 3,380 ...
Chaining zero is a fixed point from which the chaining is measured on a particular chaining line.A chaining number of, for example, 243 at a specific line location (called a chaining station) identifies that the location is the length of 243 100-foot chains (24,300 feet or 4.60 miles or 7.41 kilometres) from chaining zero, usually measured along the center line of the railroad.