Set of rails, sleepers, points of switches and couplers. It is supported integrally to the ballast by means of the sleepers embedded in the ballast itself, which form the same ballast. In some types of armament the function of the sleepers is replaced by other support elements. Together with the ballast made up the railway superstructure. It is also defined light and heavy armament, respectively, for a linear weight rails and equal / greater than 60 kg / m
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