4 feet, 8.5 inches
- Ever Wonder what determined the width of railroad tracks. The US standard railroad gauge (width between the two rails) is 4 feet, 8.5 inches. Which is an exceedingly odd number.
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Delhi's most of the Metro Route is of Broad Gauge type. Narrow Gauge have two gauges. 610mm or 2 feet wide. 762mm or 2 feet 6 inches wide. Kalka Shimla Railway line is 762mm. Darjiling Himalayan Railway is 610mm. Matheran Railway (Neral to Matheran in Mumbai Division) is 610mm.
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An exact 1:32 scale would yield 1.766 in (44.85 mm) for standard gauge prototype. The distance between the wheel tyres was set at 1 17⁄32 in (38.894 mm) and between the centre of the track 48 mm (no inch equivalent suggesting it was metric users' requirement only). The wheel width was set at 19⁄64 in (7.541 mm).
- 1.75 in (44.45 mm)
- ca. 1:32
- ³⁄₈ inch to 1 foot, ca. 10 mm to 1 ft
- 4 ft 8 ¹⁄₂ in (1,435 mm) standard gauge
For this new scale, a track width of 16.5 mm was designed to represent prototypical standard gauge track, and a model scale of 1:87 was chosen. By as early as 1922 the firm Bing in Nuremberg, Germany, had been marketing a "tabletop railway" for several years.
European O scale rolling stock (1:45), it becomes a narrow-gauge track of 750 mm (2 ft 5 1 ⁄ 2 in), and is referred to as "Oe" portraying a 750 mm prototype. United States O scale rolling stock (1:48), it becomes a narrow-gauge track of 2 ft 6 in ( 762 mm ), and is referred to as "On 2½" (or On30, as in 30 inches).
This also allowed more space to model the external valve gear. The resulting HO track gauge of 16.5 mm represents 4 feet 1.5 inches at 4 mm-to-the-foot scale; this is 7 inches under scale, or approximately 2.33 mm too narrow. In 1932 the Bing company collapsed, but the Table Railway continued to be manufactured by the new Trix company. Trix decided to use the new HO standard, being approximately half of European 0 gauge (1:43 scale).
The most common scale used with G gauge track is 1:22.5 or.533" to the foot. gap (rail) — a cut made through a piece of rail to isolate two electrical blocks from each other. Gaps are best filled with a bit of plastic when in the middle of a piece of track or an insulated rail joiner can be used at the end of a piece of piece of track.
The roadway load for bridges shall consist of a uniform load of 120 lb. per sq. ft. of surface, or a local concentration of 40k on one axle with a wheel gage of 8 ft. This load may be assumed to cover a space of 12 ft. wide by 40 ft. long.
A railroad tie or crosstie (American English) or railway sleeper (British English) is a rectangular support for the rails in railroad tracks.Generally 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 gauge.
When the railroad car is on a curve, the ends go over the track width. And, the middle of the car is forced to the inside of the track. The longer your rolling stock, the more offset you need between curves.
Important: For those new to railways and thinking of building track, it is essential to know that the track gauge is the distance between the inside edges of the opposite rails. The width of each rail is immaterial. This applies equally to full sized railways, tramways, ride-on railways and model trains. As small as it gets