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This was the first steam operated railway providing both freight and passenger services on such a small gauge and it proved the model for the introduction of narrow-gauge railways across the world. [3] In 1846, the British Parliament passed the Gauges Act that established 4 ft 8 + 1 ⁄ 2 in (1,435 mm) as the standard gauge for Britain. [4]
Europe. Australia. A narrow-gauge railway ( narrow-gauge railroad in the US) is a railway with a track gauge narrower than 1,435 mm ( 4 ft 81⁄2 in) standard gauge. Most narrow-gauge railways are between 600 mm ( 1 ft 115⁄8 in) and 1,067 mm ( 3 ft 6 in ). Since narrow-gauge railways are usually built with tighter curves, smaller structure ...
Pocket tape measures have a tape 0.3 to 10 metres (1 ft 0 in to 32 ft 10 in) in length and 6 to 25 millimetres (0.24 to 0.98 in) across. A second tape measure design is what is called the long tape. These are cased tape measures with tapes of up to 200 m in length.
The networks polarised into groups of broad gauge companies and of narrow gauge companies. The term narrow gauge at the time referred to 4 ft 8 + 1 ⁄ 2 in (1,435 mm) as well as any smaller size, all narrow relative to the broad gauge (whereas today it refers only to gauges strictly smaller than 1,435 mm (4 ft 8 + 1 ⁄ 2 in) standard gauge).
All other railways use 1,668 mm (5 ft 5 + 21 ⁄ 32 in) (broad gauge); some use 1,000 mm (3 ft 3 + 3 ⁄ 8 in) metre gauge; Decauville uses 500 mm (19 + 3 ⁄ 4 in) gauge. Planned and under construction high-speed railways to use 1,668 mm ( 5 ft 5 + 21 ⁄ 32 in ) to maintain interoperability with the rest of the network.
The 37.5 mm length is not derived by a certain scale ratio. While HO scale is a 1:87 scale (3.5 mm to 1 foot), resulting in a 16.5 mm ( 0.65 in) gauge from real life prototype 1,435 mm ( 4 ft 81⁄2 in) standard gauge standard gauge. Conversely, modeling standard gauge in Lego trains would yield a scaling of (37.5:1435 =) 1:38.3.
Strain gauge: a device used to measure the strain of an object. Thread pitch gauge, also called a threading gauge, pitch gauge, or screw gauge a device used to measure the pitch or lead of screw threads. Vernier height gauge: a measuring device used either for determining the height of something, or for repetitious marking of items to be worked on.
3 ft gauge railways in the United Kingdom (4 C, 2 P) 3 ft 2 in gauge railways in the United Kingdom (1 C) Metre gauge railways in the United Kingdom (1 C, 1 P)