49 CFR Part 237
§ 237.131 — Design
FRA Part 237 · Subpart F — Repair and Modification of Bridges. Full current text with cross-references on BuildSpec.
§ 237.131 Design. Each repair or modification which materially modifies the capacity of a bridge or the stresses in any primary load-carrying component of a bridge shall be designed by a railroad bridge engineer. The design shall specify the manner in which railroad traffic or other live loads may be permitted on the bridge while it is being modified or repaired. Designs and procedures for repair or modification of bridges of a common configuration, such as timber trestles, or instructions for in-kind replacement of bridge components, may be issued as a common standard. Where the common…
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