7/9/2023 0 Comments Babylon dictionary track![]() The rail is usually held down to the sleeper with resilient fastenings, although cut spikes are widely used in North American practice. A plastic or rubber pad is usually placed between the rail and the tie plate where concrete sleepers are used. Most railroads with heavy traffic utilise continuously welded rails supported by sleepers attached via base plates that spread the load. Notwithstanding modern technical developments, the overwhelmingly dominant track form worldwide consists of flat-bottom steel rails supported on timber or pre-stressed concrete sleepers, which are themselves laid on crushed stone ballast. ![]() Sometimes there is a layer of rubber matting (not shown) to improve drainage, and to dampen sound and vibration Traditional track structure The layers are slightly sloped to help drainage. Section through railway track and foundation showing the ballast and formation layers.
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