49 CFR Part 213
§ 213.331 — Track surface
FRA Part 213 · Subpart G — Train Operations at Track Classes 6 and Higher. Full current text with cross-references on BuildSpec.
§ 213.331 Track surface. (a) For a single deviation in track surface, each track owner shall maintain the surface of its track within the limits prescribed in the following table: Track surface (inches) Class of track 6 7 8 9 The deviation from uniform 1 profile on either rail at the mid-ordinate of a 31-foot chord may not be more than 1 1 3⁄4 1⁄2 The deviation from uniform profile on either rail at the mid-ordinate of a 62-foot chord may not be more than 1 1 1 3⁄4 Except as provided in paragraph (b) of this section, the deviation from uniform profile on either rail at the mid-ordinate of a…
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