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Above ground pools must also follow state and local pool codes if the water is at least 18 inches deep. In 2006, 283 children under the age of five drowned in swimming pools in the United States. The I.C.C. pool safety standards specify that: [7] The fence must be a minimum of 48" tall (or taller, depending on distance between horizontal rails).
An elevated railway or elevated train (also known as an el train or el for short) is a railway with the tracks above street level on a viaduct or other elevated structure (usually constructed from steel, cast iron, concrete, or bricks). The railway may be broad-gauge, standard-gauge or narrow-gauge railway, light rail, monorail, or a suspension ...
A suspension railway is a form of elevated monorail in which the vehicle is suspended from a fixed track (as opposed to a cable used in aerial tramways), which is built above streets, waterways, or existing railway track. The Memphis Suspension Railway
Grooved rail, used when track is laid in places traversed by other vehicles or pedestrians. A grooved rail, groove rail, or girder rail is a special rail with a groove designed for tramway or railway track in pavement or grassed surfaces (grassed track or track in a lawn). The head on the right-hand side of the rail bears the vehicle's weight.
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It used a load-bearing single rail and two lower, external rails for balance, the three carried on triangular supports. It was cheap to construct but tricky to operate. Possibly the first monorail locomotive was a 0-3-0 steam locomotive on this line. A high-speed monorail using the Lartigue system was proposed in 1901 between Liverpool and ...
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