49 CFR 213.331 - Track surface.

§ 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 124-foot chord may not be more than 1 3/4 1 1/2 1 1/4 1
The deviation from zero crosslevel at any point on tangent track may not be more than 2 1 1 1 1
Reverse elevation on curves may not be more than 1/2 1/2 1/2 1/2
The difference in crosslevel between any two points less than 62 feet apart may not be more than 3 1 1/2 1 1/2 1 1/4 1
On curved track, the difference in crosslevel between any two points less than 10 feet apart (short warp) may not be more than 1 1/4 1 1/8 1 3/4

1 Uniformity for profile is established by placing the midpoint of the specified chord at the point of maximum measurement.

2 If physical conditions do not permit a spiral long enough to accommodate the minimum length of runoff, part of the runoff may be on tangent track.

3 However, to control harmonics on jointed track with staggered joints, the crosslevel differences shall not exceed 1 inch in all of six consecutive pairs of joints, as created by seven low joints. Track with joints staggered less than 10 feet apart shall not be considered as having staggered joints. Joints within the seven low joints outside of the regular joint spacing shall not be considered as joints for purposes of this footnote.

(b) For operations at a qualified cant deficiency, Eu, of more than 5 inches, a single deviation in track surface shall be within the limits prescribed in the following table:

Track surface (inches) Class of track
6 7 8 9
The difference in crosslevel between any two points less than 10 feet apart (short warp) may not be more than 1 1/4 1 1 1 3/4
The deviation from uniform profile on either rail at the mid-ordinate of a 124-foot chord may not be more than 1 1/2 1 1/4 1 1/4 1

1 For curves with a qualified cant deficiency, Eu, of more than 7 inches, the difference in crosslevel between any two points less than 10 feet apart (short warp) may not be more than three-quarters of an inch.

(c) For three or more non-overlapping deviations in track surface occurring within a distance equal to five times the specified chord length, each of which exceeds the limits in the following table, each track owner shall maintain the surface of the track within the limits prescribed for each deviation:

Track surface (inches) Class of track
6 7 8 9
The deviation from uniform profile on either rail at the mid-ordinate of a 31-foot chord may not be more than 3/4 3/4 1/2 3/8
The deviation from uniform profile on either rail at the mid-ordinate of a 62-foot chord may not be more than 3/4 3/4 3/4 1/2
The deviation from uniform profile on either rail at the mid-ordinate of a 124-foot chord may not be more than 1 1/4 1 7/8 5/8
[ 78 FR 16106, Mar. 13, 2013]

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United States Code
Statutes at Large

Title 49 published on 09-May-2017 04:41

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 49 CFR Part 213 after this date.

  • 2017-04-13; vol. 82 # 70 - Thursday, April 13, 2017
    1. 82 FR 17765 - Implementation of the Federal Civil Penalties Inflation Adjustment Act Improvements Act for a Violation of a Federal Railroad Safety Law, Federal Railroad Administration Safety Regulation or Order, or the Hazardous Material Transportation Laws or Regulations, Orders, Special Permits, and Approvals Issued Under Those Laws
      GPO FDSys XML | Text
      DEPARTMENT OF TRANSPORTATION, Federal Railroad Administration
      Final rule.
      This final rule is effective April 13, 2017.
      49 CFR Parts 209, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 270, and 272