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Electronic Code of Federal Regulations

e-CFR data is current as of December 4, 2019

Title 49Subtitle BChapter IIPart 213Subpart G → §213.331


Title 49: Transportation
PART 213—TRACK SAFETY STANDARDS
Subpart G—Train Operations at Track Classes 6 and Higher


§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
6789
The deviation from uniform1 profile on either rail at the mid-ordinate of a 31-foot chord may not be more than11 34 12
The deviation from uniform profile on either rail at the mid-ordinate of a 62-foot chord may not be more than111 34
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 than134 112 114 1
The deviation from zero crosslevel at any point on tangent track may not be more than21111
Reverse elevation on curves may not be more than 12 12 12 12
The difference in crosslevel between any two points less than 62 feet apart may not be more than3112 112 114 1
On curved track, the difference in crosslevel between any two points less than 10 feet apart (short warp) may not be more than114 118 1 34

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

2If 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.

3However, 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
6789
The difference in crosslevel between any two points less than 10 feet apart (short warp) may not be more than114 111 34
The deviation from uniform profile on either rail at the mid-ordinate of a 124-foot chord may not be more than112 114 114 1

1For 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
6789
The deviation from uniform profile on either rail at the mid-ordinate of a 31-foot chord may not be more than 34 34 12 38
The deviation from uniform profile on either rail at the mid-ordinate of a 62-foot chord may not be more than 34 34 34 12
The deviation from uniform profile on either rail at the mid-ordinate of a 124-foot chord may not be more than114 1 78 58

[78 FR 16106, Mar. 13, 2013]

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