49 CFR Part 213
§ 213.334 — Ballast; general
FRA Part 213 · Subpart G — Train Operations at Track Classes 6 and Higher. Full current text with cross-references on BuildSpec.
§ 213.334 Ballast; general. Unless it is otherwise structurally supported, all track shall be supported by material which will— (a) Transmit and distribute the load of the track and railroad rolling equipment to the subgrade; (b) Restrain the track laterally, longitudinally, and vertically under dynamic loads imposed by railroad rolling equipment and thermal stress exerted by the rails; (c) Provide adequate drainage for the track; and (d) Maintain proper track crosslevel, surface, and alinement.
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