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Comparison of 1 square foot with some Imperial and metric units of area. The square foot (pl. square feet; abbreviated sq ft, sf, or ft 2; also denoted by ' 2 and ⏍) is an imperial unit and U.S. customary unit (non-SI, non-metric) of area, used mainly in the United States and partially in Canada, the United Kingdom, Bangladesh, India, Nepal, Pakistan, Ghana, Liberia, Malaysia, Myanmar ...
The foot (standard symbol: ft) [1][2] is a unit of length in the British imperial and United States customary systems of measurement. The prime symbol, ′, is commonly used to represent the foot. [3] In both customary and imperial units, one foot comprises 12 inches, and one yard comprises three feet. Since an international agreement in 1959 ...
The Maine Narrow Gauge Railroad in Portland, Maine. In New England, the first narrow-gauge common-carrier railroad was the Billerica and Bedford Railroad, which ran from North Billerica to Bedford in Middlesex County, Massachusetts from 1877 to 1878. There were extensive 2 ft (610 mm) gauge lines in the Maine forests early in the 20th century.
Thus, a "3-foot" wave is roughly six feet high (in actuality a height of ~1.8 m), i.e., head-high to a 6-foot (~180 cm) person; a "2-foot" wave is roughly four feet high (height of ~1.2 m), i.e., chest-high to such a person; and a "6- to 8-foot" wave would be 2 to approaching 3 times head-high to such a person (height of ~3.5 to 5 m). As wave ...
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 gauges ...
1:48 1⁄4" scale used for Queensland sugar cane railways[17] and US subjects[18] of 3 ft 6 in. (1,067 mm) ^ O21 – [1] 3 ft (914 mm) ^ O16.5 – UK 7 mm scale with 00 16.5 mm gauge, used to model gauges between 2 ft (610 mm) and 2 ft 6 in (762 mm). ^ O14 – Finescale modelling of British 2ft gauge using 7 mm O scale and a unique 14 mm gauge.
There is evidence that Lord quarry (later part of the Votty & Bowydd quarry complex) and other North Wales slate quarries used 2 ft 3 in gauge tramways in the 1820s. [14] Plynlimon and Hafan Tramway [5] 1897 1899 7 miles (11.3 km) [5] Talybont, Wales Short-lived line serving the lead mines around Hafan. Ratgoed Tramway [15] 1864 1952
This is a list of 3 ft (914 mm) narrow-gauge railways in the United States. Narrow-gauge railroads of various sizes existed across the US, especially during the late 1800s, with the most popular gauge being 3 ft gauge. [1][2] Some of the more famous 3 ft gauge railroad networks in the US were based in California, Colorado, and Hawaii.