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Height of rail equaled width of foot for each ASCE tee-rail weight; and the profiles specified fixed proportion of weight in head, web and foot of 42%, 21% and 37%, respectively. ASCE 90 lb/yd (44.6 kg/m) profile was adequate; but heavier weights were less satisfactory.
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 ...
This rail gauge was soon changed to 7 ft 1 ⁄ 4 in (2,140 mm) [105] to ease running in curves. 2,140 mm 7 ft 1 ⁄ 4 in: South Africa East London and Table Bay harbour railways England Brunel's Great Western Railway until converted to standard gauge by May 1892, see Great Western Railway The "gauge war".
Heavier rail can support greater axle loads and higher train speeds without sustaining damage than lighter rail, but at a greater cost. In North America and the United Kingdom, rail is graded in pounds per yard (usually shown as pound or lb), so 130-pound rail would weigh 130 lb/yd (64 kg/m). The usual range is 115 to 141 lb/yd (57 to 70 kg/m).
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 ...
In Finland, rail cars can be up to 3.4 m (11 ft 2 in) wide with a permitted height from 4.37 m (14 ft 4 in) on the sides to 5.3 m (17 ft 5 in) in the centre. [54] The track gauge is 1,524 mm ( 5 ft ), differing 4 mm ( 5 ⁄ 32 in) from the 1,520 mm ( 4 ft 11 + 27 ⁄ 32 in ) Russian track gauge.
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For example, if a curve with standard-gauge rail can allow speed up to 145 km/h (90 mph), the same curve with narrow-gauge rail can only allow speed up to 130 km/h (81 mph). [ 12 ] In Japan and Queensland, recent permanent-way improvements have allowed trains on 3 ft 6 in ( 1,067 mm ) gauge tracks to exceed 160 km/h (99 mph).