49 CFR Part 213
§ 213.359 — Track stiffness
FRA Part 213 · Subpart G — Train Operations at Track Classes 6 and Higher. Full current text with cross-references on BuildSpec.
§ 213.359 Track stiffness. (a) Track shall have a sufficient vertical strength to withstand the maximum vehicle loads generated at maximum permissible train speeds, cant deficiencies and surface defects. For purposes of this section, vertical track strength is defined as the track capacity to constrain vertical deformations so that the track shall return following maximum load to a configuration in compliance with the vehicle/track interaction safety limits and geometry requirements of this subpart. (b) Track shall have sufficient lateral strength to withstand the maximum thermal and vehicle…
The full text is for BuildSpec members
Read the complete section, search across every adopted code, run the calculators and ask Copilot — free for 14 days, no card required.
- Full text of every FRA Part 213 section
- Search across all federal and state standards in one place
- Related sections, figures and tables
- Ask Copilot about this section, with citations