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Electronic Code of Federal Regulations

e-CFR data is current as of December 5, 2019

Title 49Subtitle BChapter IIPart 213Subpart C → §213.55


Title 49: Transportation
PART 213—TRACK SAFETY STANDARDS
Subpart C—Track Geometry


§213.55   Track alinement.

(a) Except as provided in paragraph (b) of this section, alinement may not deviate from uniformity more than the amount prescribed in the following table:

Class of trackTangent trackCurved track
The deviation of the mid-offset from a 62-foot line1 may not be more than—(inches)The deviation of the mid-ordinate from a 31-foot chord2 may not be more than—(inches)The deviation of the mid-ordinate from a 62-foot chord2 may not be more than—(inches)
Class 1 track53N/A5
Class 2 track33N/A3
Class 3 track134 114 134
Class 4 track112 1112
Class 5 track 34 12 58

1  The ends of the line shall be at points on the gage side of the line rail, five-eighths of an inch below the top of the railhead. Either rail may be used as the line rail; however, the same rail shall be used for the full length of that tangential segment of the track.

2  The ends of the chord shall be at points on the gage side of the outer rail, five-eighths of an inch below the top of the railhead.

3  N/A—Not Applicable

(b) For operations at a qualified cant deficiency, Eu, of more than 5 inches, the alinement of the outside rail of the curve may not deviate from uniformity more than the amount prescribed in the following table:

Class of trackCurved track
The deviation of the mid-ordinate from a 31-foot chord1 may not be more than—(inches)The deviation of the mid-ordinate from a 62-foot chord1 may not be more than—(inches)
Class 1 track23N/A114
Class 2 track23N/A114
Class 3 track 34 114
Class 4 track 34 78
Class 5 track 12 58

1The ends of the chord shall be at points on the gage side of the outer rail, five-eighths of an inch below the top of the railhead.

2Restraining rails or other systems may be required for derailment prevention.

3N/A—Not Applicable

[78 FR 16100, Mar. 13, 2013]

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