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Bridges and tunnels must have a clearance of at least 4,900 mm (16 ft 15 ⁄ 16 in) wide and 6,400 mm (20 ft 11 + 15 ⁄ 16 in) high. The structure gauge S p for passenger platforms allows 4,900 mm (16 ft 15 ⁄ 16 in) only above 1,100 mm (3 ft 7 + 5 ⁄ 16 in) (the common platform height) requiring a width of 3,840 mm (12 ft 7 + 3 ⁄ 16 in ...
The term HOn30 (and sometimes HOn2½) is generally used when modelling American prototypes while H0e is used for European prototypes. In Britain, the term OO9 is used. [1] All these terms refer to models of narrow-gauge railways built to the world's most popular model railway scale of HO (1:87) but using a track gauge of 9 mm (0.354 in)—the gauge used for N scale models of standard-gauge ...
HO or H0 is a rail transport modelling scale using a 1:87 scale (3.5 mm to 1 foot). It is the most popular scale of model railway in the world. [1] [2] The rails are spaced 16.5 millimetres (0.650 in) apart for modelling 1,435 mm (4 ft 8 + 1 ⁄ 2 in) standard gauge tracks and trains in HO.
Brass models are scale models typically of railroad equipment, bridges and occasionally of buildings, made from brass or similar alloys. Although die-cast or plastic models have made considerable advances in late 1990s and continue to improve, brass models offer finer details.
Goat Canyon Trestle is a wooden trestle in San Diego County, California. [1] At a length of 597–750 feet (182–229 m), it is the world's largest all-wood trestle. [1] [8] [10] [11] Goat Canyon Trestle was built in 1933 as part of the San Diego and Arizona Eastern Railway, after one of the many tunnels through the Carrizo Gorge collapsed.
The low elevation and deep bedrock of Lower Manhattan was more conducive to a tunnel than to a bridge. [44]: 13–14 [66] [67] By the end of that year, the consulting engineers for both the 57th Street Bridge and the Canal Street Tunnel had submitted their plans to the Bridge and Tunnel Commission. [68]
On3 – Using O scale (1:48 ratio) with 0.75 in (19.05 mm) gauge track. Probably the second most popular scale. F scale – using 1:20.3 ratio with 45 mm (1.772 in) gauge track. This scale uses the same gauge as, and is derived from the popular G scale. It is the largest popular scale/gauge combination, and is suitable for use in the garden.
Scope: This project is related to articles about specific bridges and tunnels, types of bridges and tunnels, lists of bridges and tunnels, bridge and tunnel categorization, and related templates. If you would like to help, check the to do list or articles needing attention. Feel free to include yourself to the list of participants.
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