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2. 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.

3. Track gauge - Wikipedia

   en.wikipedia.org/wiki/Track_gauge

   Uses of the term. 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 sides.

4. Billiard table - Wikipedia

   en.wikipedia.org/wiki/Billiard_table

   Billiard Table Manufactory, J. M. Brunswick & Bro., Proprietors, Cincinnati, Ohio, 1865 ad. A billiard table or billiards table is a bounded table on which cue sports are played. In the modern era, all billiards tables (whether for carom billiards, pool, pyramid or snooker) provide a flat surface usually made of quarried slate, that is covered ...

5. 19-inch rack - Wikipedia

   en.wikipedia.org/wiki/19-inch_rack

   The 19-inch (482.6 mm) standard rack arrangement is widely used throughout the telecommunication, computing, audio, video, entertainment and other industries, though the Western Electric 23-inch standard, with holes on 1-inch (25.4 mm) centers, is still used in legacy ILEC / CLEC facilities. A 19-inch rack used for switches at the DE-CIX in ...

6. Railroad tie - Wikipedia

   en.wikipedia.org/wiki/Railroad_tie

   A railroad tie, crosstie ( American English ), railway tie ( Canadian English) or railway sleeper ( Australian and British English) is a rectangular support for the rails in railroad tracks. Usually laid perpendicular to the rails, ties transfer loads to the track ballast and subgrade, hold the rails upright and keep them spaced to the correct ...

7. Railway track - Wikipedia

   en.wikipedia.org/wiki/Railway_track

   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). In Europe, rail is graded in kilograms per metre and the usual range is 40 to 60 kg/m (81 to 121 lb/yd).