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The chain (abbreviated ch) is a unit of length equal to 66 feet (22 yards), used in both the US customary and Imperial unit systems. It is subdivided into 100 links . [ 1 ] [ 2 ] There are 10 chains in a furlong , and 80 chains in one statute mile . [ 2 ]
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.
In a horizontal or vertical cable rail, the cables, once tensioned must be rigid enough to prevent a 4-inch sphere passing through it. Factors influencing this rigidity are: the tension of the cable, intermediate posts (or cable spacers) spacing, the diameter of the cable, top rail cap material and the cable to cable spacing. [7]
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
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.
The line originally used wooden rails and a hemp haulage rope and was operated by human or animal power. Today, steel rails, steel cables and an electric motor have taken over, but the line still follows the same route through the castle's fortifications. This line is generally described as the oldest funicular. [5] [6]
For a line with a maximum speed of 60 km/h (37 mph), buffer-and-chain couplers increase the minimum radius to around 150 m (164 yd; 492 ft). As narrow-gauge railways , tramways , and rapid transit systems normally do not interchange with mainline railways, instances of these types of railway in Europe often use bufferless central couplers and ...
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.
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