49 C.F.R. § 213.63 Track surface.
Title 49 - Transportation
Each owner of the track to which this part applies shall maintain the surface of its track within the limits prescribed in the following table: [63 FR 34029, June 22, 1998; 63 FR 45959, Aug. 28, 1998]
Title 49: Transportation
PART 213—TRACK SAFETY STANDARDS
Subpart C—Track Geometry
§ 213.63 Track surface.
---------------------------------------------------------------------------------------------------------------- Class of track ------------------------------------------------------ Track surface 1 2 3 4 5 (inches) (inches) (inches) (inches) (inches)----------------------------------------------------------------------------------------------------------------The runoff in any 31 feet of rail at the end of a raise 3\1/2\ 3 2 1\1/2\ 1 may not be more than....................................The deviation from uniform profile on either rail at the 3 2\3/4\ 2\1/4\ 2 1\1/4\ mid-ordinate of a 62-foot chord may not be more than....The deviation from zero crosslevel at any point on 3 2 1\3/4\ 1\1/4\ 1 tangent or reverse crosslevel elevation on curves may not be more than........................................The difference in crosslevel between any two points less 3 2\1/4\ 2 1\3/4\ 1\1/2\ than 62 feet apart may not be more than* \1,2\..........* Where determined by engineering decision prior to the 2 1\3/4\ 1\1/4\ 1 \3/4\ promulgation of this rule, due to physical restrictions on spiral length and operating practices and experience, the variation in crosslevel on spirals per 31 feet may not be more than........................................----------------------------------------------------------------------------------------------------------------\1\ Except as limited by § 213.57(a), where the elevation at any point in a curve equals or exceeds 6 inches, the difference in crosslevel within 62 feet between that point and a point with greater elevation may not be more than 1\1/2\ inches. (Footnote 1 is applicable September 21, 1999.)\2\ However, to control harmonics on Class 2 through 5 jointed track with staggered joints, the crosslevel differences shall not exceed 1\1/4\ inches in all of six consecutive pairs of joints, as created by 7 low joints. Track with joints staggered less than 10 feet shall not be considered as having staggered joints. Joints within the 7 low joints outside of the regular joint spacing shall not be considered as joints for purposes of this footnote. (Footnote 2 is applicable September 21, 1999.)
