49 CFR 213.327 - Track alinement.

§ 213.327 Track alinement.

(a) Uniformity at any point along the track is established by averaging the measured mid-chord offset values for nine consecutive points that are centered around that point and spaced according to the following table:

Chord length Spacing
31′ 7′9″
62′ 15′6″
124′ 31′0″

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

Class of track Tangent/
Curved track
The deviation from uniformity of the mid-chord offset for a 31-foot chord may not be more than - (inches) The deviation from uniformity of the mid-chord offset for a 62-foot chord may not be more than - (inches) The deviation from uniformity of the mid-chord offset for a 124-foot chord may not be more than - (inches)
Class 6 track Tangent 1/2 3/4 1 1/2
Curved 1/2 5/8 1 1/2
Class 7 track Tangent 1/2 3/4 1 1/4
Curved 1/2 1/2 1 1/4
Class 8 track Tangent 1/2 3/4 1
Curved 1/2 1/2 3/4
Class 9 track Tangent 1/2 1/2 3/4
Curved 1/2 1/2 3/4

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

Class of track Track type The deviation from uniformity of the mid-chord offset for a 31-foot chord may not be more than - (inches) The deviation from uniformity of the mid-chord offset for a 62-foot chord may not be more than - (inches) The deviation from uniformity of the mid-chord offset for a 124-foot chord may not be more than - (inches)
Class 6 track Curved 1/2 5/8 1 1/4
Class 7 track Curved 1/2 1/2 1
Class 8 track Curved 1/2 1/2 3/4
Class 9 track Curved 1/2 1/2 3/4

(d) For three or more non-overlapping deviations from uniformity in track alinement 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 alinement of the track within the limits prescribed for each deviation:

Class of track The deviation from uniformity of the mid-chord offset for a
31-foot chord may not be more than - (inches)
The deviation from uniformity of the mid-chord offset for a 62-foot chord may not be more than - (inches) The deviation from uniformity of the mid-chord offset for a 124-foot chord may not be more than - (inches)
Class 6 track 3/8 1/2 1
Class 7 track 3/8 3/8 7/8
Class 8 track 3/8 3/8 1/2
Class 9 track 3/8 3/8 1/2

(e) For purposes of complying with this section, the ends of the chord shall be at points on the gage side of the rail, five-eighths of an inch below the top of the railhead. On tangent track, 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. On curved track, the line rail is the outside rail of the curve.

[ 78 FR 16104, 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