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  2. Glossary of North American railway terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_North_American...

    A Guilford Rail System locomotive showing the Big G paint scheme A nickname for Guilford Rail System, in reference to the large "G" emblem on their locomotives and boxcars [37] The Great Northern Railway [38] [unreliable source?] [39] [40] Big Hole [41] [42] [43] The "Big Hole" is the Emergency position of the engineer's air brake valve.

  3. Loading gauge - Wikipedia

    en.wikipedia.org/wiki/Loading_gauge

    The maximum width of 10 ft 8 in (3.25 m) on 41 ft 3 in (12.57 m) (AAR Plate B), 46 ft 3 in (14.10 m) (AAR Plate C) and all other truck centers (of all other AAR Plates) are on a 441 ft 8 + 3 ⁄ 8 in (134.63 m) radius or 13° curve. [30] [31] In all cases of the increase of truck centers, the decrease of width is covered by AAR Plates D1 and D2.

  4. 5 ft 6 in gauge railway - Wikipedia

    en.wikipedia.org/wiki/5_ft_6_in_gauge_railway

    The use of 1,676 mm (5 ft 6 in) broad gauge rails was one of many unconventional design elements included in its design which, in addition to its unusual gauge, also used flat-edge rail, rather than typical rail that angles slightly inward [5] (although the shape of BART wheels and rail has been modified since then [6]). This has complicated ...

  5. Rail profile - Wikipedia

    en.wikipedia.org/wiki/Rail_profile

    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.

  6. Track gauge - Wikipedia

    en.wikipedia.org/wiki/Track_gauge

    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 ...

  7. Glossary of rail transport terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_rail_transport...

    The exterior cylindrical surface of a wheel which bears on the rails. The usual width of wheel tread is about 4 inches, measured from outside of wheel tread to the throat or inside of flange. The standard width from outside of wheel tread to inside face of flange, i. e.. including the entire thickness of flange, is 5!£ inches.

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