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The rail profile is the cross sectional shape of a railway rail, perpendicular to its length. Early rails were made of wood, cast iron or wrought iron. All modern rails are hot rolled steel with a cross section approximate to an I-beam, but asymmetric about a horizontal axis (however see grooved rail below). The head is profiled to resist wear ...
Rail junctions (10 C, 2 P) L. Railway line types (8 P) P. Railway platforms (17 P) S. Railway sidings (1 C, 14 P) T. Track geometry (10 P) Tram loops (1 C, 1 P)
Cross-sections of rail. Left: flat-bottomed rail, which is spiked, screwed or clipped directly to a sleeper (CwthE) or crosstie (AE), or through a steel baseplate, which protects the sleeper. Right: bullhead rail, an older design used mainly in the UK, which sits in a cast-iron chair with a timber or spring-steel key to keep it secure.
Cross-section of 4-rail dual-gauge track (standard and metre gauge/ narrow gauge) (click to enlarge) Cross-section of Australian dual-gauge track – 1600 mm (5 ft 3 in) and 1435 mm (4 ft 8 + 1 ⁄ 2 in) gauges (click to enlarge) Mixed gauge track at Sassari, Sardinia: 1,435 mm (4 ft 8 + 1 ⁄ 2 in) standard gauge and 950 mm (3 ft 1 + 3 ⁄ 8 in)
Crosslevel (or 'cross level') is the measurement of the difference in elevation (height) between the top surface of the two rails at any point of railroad track. The two points (each at the head of each rail) are measured at by the right angles to the reference rail. Since the rail can slightly move up and down, the measurement should be done ...
An approximation of profiles of flat-bottom rail and bullhead rail, respectively the most common profile world-wide and the profile once dominant in the United Kingdom. Note: A drawing to scale is Drawing -- tramway and railway wheel and rail profiles.png. Date: SVG version: 12 April 2008. GIF version: 10 January 2005: Source
A level junction (or in the United Kingdom a flat crossing) is a railway junction that has a track configuration in which merging or crossing railroad lines provide track connections with each other that require trains to cross over in front of opposing traffic at grade (i.e. on the level).
Albany and Susquehanna Railroad, Erie Railroad until June 22, 1880, Delaware, Lackawanna and Western Railroad March–May 1876, Predominant gauge used by railroads along southern tier of New York State that connected to the pioneering Erie Railroad. Most lines converted to standard gauge 1876-1880, along with the Erie. 1,850 mm 6 ft 27 ⁄ 32 in