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The appropriate thickness of a layer of track ballast depends on the size and spacing of the ties, the amount of traffic on the line, and various other factors. [1] Track ballast should never be laid down less than 150 mm (6 inches) thick, [5] and high-speed railway lines may require ballast up to 0.5 metres (20 inches) thick. [6]
Section through railway track and foundation showing the ballast and formation layers. The track bed or trackbed is the groundwork onto which a railway track is laid. Trackbeds of disused railways are sometimes used for recreational paths or new light rail links.
An axlebox, also known as a journal box in North America, is the mechanical subassembly on each end of the axles under a railway wagon, coach or locomotive; it contains bearings and thus transfers the wagon, coach or locomotive weight to the wheels and rails; the bearing design is typically oil-bathed plain bearings on older rolling stock, or roller bearings on newer rolling stock.
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A transfer table contains two tracks with different configurations. The table is moved sideways or rotated [3] to choose the configuration that connects the track that the incoming train will be traveling from and to. Using transfer table as a switch or a rotary switch allows the center rack rail to be aligned for the cog wheels to continually ...
A prototype was revealed at the Derby factory of train manufacturer Alstom on Thursday. ‘Game-changing’ train seat that can be converted into lie-flat bed unveiled Skip to main content
Flat wagons for carrying timber: the Class Snps 719 (front) and the Class Roos-t 642 (behind). Flat wagons (sometimes flat beds, flats or rail flats, US: flatcars), as classified by the International Union of Railways (UIC), are railway goods wagons that have a flat, usually full-length, deck (or 2 decks on car transporters) and little or no superstructure.
Gauntlet tracks can be used to provide horizontal clearance to a fixed obstruction adjacent to a track such as a cutting, bridge, or tunnel.Frog gauntlets are also commonly used when a rail line's capacity is increased by the provision of an additional track, but cost or other factors prevent the widening of the bridges.