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Flanged T rail (also called T-section) is the name for flat bottomed rail used in North America. Iron-strapped wooden rails were used on all American railways until 1831. Col. Robert L. Stevens, the President of the Camden and Amboy Railroad, conceived the idea that an all-iron rail would be better suited for building a railroad. There were no ...
Many railways preferred a flat bottom rail section, where the rails could be laid directly on the sleepers, representing a marked cost saving. Indenting of the sleeper was the problem; where the traffic was heavy, it became necessary to provide a sole plate under the rails to spread the load on the tie, partly vitiating the cost saving.
Cross-sections of rail. Left: flat-bottomed rail , which is spiked, screwed or clipped directly to a sleeper ( CwthE ) or crosstie ( AE ), or through a steel baseplate , which protects the sleeper.
An approximation of profiles of flat-bottom rail and bullhead rail, respectively the most common profile world-wide and the profile once dominant in the United Kingdom. Note: A drawing to scale is Drawing -- tramway and railway wheel and rail profiles.png. Date: SVG version: 12 April 2008. GIF version: 10 January 2005: Source
The unit's regular sister unit was 79 Railway Squadron and sometimes undertakes permanent way work with the Royal Engineers unit 507 STRE. 275 Railway Squadron's now defunct insignia is a cross section of flat bottom rail in a blue diamond.
Rail profile Rail profiles for flat-bottom and bullhead rails The cross section shape of rail. There are many rail profiles, often specific to individual railroads. Rails must be periodically scanned electronically, the data inspected and analysed, then re-profiled with rail grinding machines to maintain the safe and proper rail profile. Rails ...
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Block rail is a lower profile form of girder guard rail, where the web is eliminated. In profile it is more like a solid form of bridge rail with a flangeway and guard added. Simply removing the web and combining the head section directly with the foot section would result in a weak rail, so additional thickness is required in the combined section.
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