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2. Rail profile - Wikipedia

   en.wikipedia.org/wiki/Rail_profile

   The weight of a rail per length is an important factor in determining rail strength and hence axleloads and speeds. Weights are measured in pounds per yard (imperial units in Canada, the United Kingdom and United States) and kilograms per metre in mainland Europe and Australia). 1 kg/m = 2.0159 lb/yd.

3. 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).

4. Axle load - Wikipedia

   en.wikipedia.org/wiki/Axle_load

   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.

5. Cable railing - Wikipedia

   en.wikipedia.org/wiki/Cable_railing

   This type of stainless strand is designed to have limited stretch, as compared to galvanized, [6] making it a good long term cable railing solution. It has long been used for yacht stays and guy wires, proving its outdoor durability and strength.

6. History of the railway track - Wikipedia

   en.wikipedia.org/wiki/History_of_the_railway_track

   Rails were typically specified by units of weight per linear length and these also increased. Railway sleepers were traditionally made of Creosote-treated hardwoods and this continued through to modern times. Continuous welded rail was introduced into Britain in the mid 1960s and this was followed by the introduction of concrete sleepers.

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