49 CFR Part 213
§ 213.63 — Track surface
FRA Part 213 · Subpart C — Track Geometry. Full current text with cross-references on BuildSpec.
§ 213.63 Track surface. (a) Except as provided in paragraph (b) of this section, each track owner shall maintain the surface of its track within the limits prescribed in the following table: Track surface (inches) Class of track 1 2 3 4 5 The deviation from uniform profile on either rail at the mid-ordinate of a 62-foot chord may not be more than 3 2 3⁄4 2 1⁄4 2 1 1⁄4 The deviation from zero crosslevel at any point on tangent or reverse crosslevel elevation on curves may not be more than 3 2 1 3⁄4 1 1⁄4 1 The difference in crosslevel between any two points less than 62 feet apart may not be…
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