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While W5 to W9 are based on a rounded roof structure, those for W10 to W12 define a flat line at the top and, instead of a strict static gauge for the wagons, their sizes are derived from dynamic gauge computations for rectangular freight containers. [15] Network Rail uses a W loading gauge classification system of freight transport ranging ...
In North America, equipment for unlimited interchange between railway companies is built to accommodate for a 288-foot (88 m) radius, but normally a 410-foot (125 m) radius is used as a minimum, as some freight carriages (freight cars) are handled by special agreement between railways that cannot take the sharper curvature.
The standard rail weight for British railways is now 113 lb/yd (56.1 kg/m). Before the 1990s, most diesel locomotives were built to a maximum axle load of 19 long tons (19.3 tonnes; 21.3 short tons) so the maximum locomotive weight was 76 long tons (77.2 tonnes; 85.1 short tons) for a four-axle locomotive and 114 long tons (115.8 tonnes; 127.7 short tons) for a six-axle one.
Track superelevation is usually limited to 6 inches (150 mm), and is often lower on routes with slow heavy freight trains in order to reduce wear on the inner rail. Allowed unbalanced superelevation in the U.S. is restricted to 3 inches (76 mm), though 6 inches (152 mm) is permissible by waiver.
All the early French railways (including Saint-Etienne Andrezieux, authorised 1823, opened 1827) had a French Gauge of 1,500 mm (4 ft 11 + 1 ⁄ 16 in) from rail axis to rail axis, compatible with early standard gauge tolerances) Dublin and Kingstown Railway: 1831: 1834 For passenger traffic: converted to 5 ft 3in Newcastle & Carlisle Railway ...
The most common use of the term "track gauge" refers to the transverse distance between the inside surfaces of the two load-bearing rails of a railway track, usually measured at 12.7 millimetres (0.50 inches) to 15.9 millimetres (0.63 inches) below the top of the rail head in order to clear worn corners and allow for rail heads having sloping ...
Another consideration is the maximum weight of a train. A maximum length train in Europe, 750 m (2,461 ft) long can have 50 container cars with a total weight of 2,250 tonnes (2,480 short tons; 2,210 long tons), and more if 20 ft containers are included. This is not far from the limit using standard European (freight) couplers. [citation needed]
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 ...