(a) Gage is measured between the heads of the rails at right-angles to the rails in a plane five-eighths of an inch below the top of the rail head.
(b) Gage shall be within the limits prescribed in the following table:
Class of track
| The gage must be at least—
| But not more than—
| The change of gage within 31 feet must not be greater than—
|
---|
Class 6 track | 4′8″ | 4′9
1/4″ |
3/4″
|
Class 7 track | 4′8″ | 4′9
1/4″ |
1/2″
|
Class 8 track | 4′8″ | 4′9
1/4″ |
1/2″
|
Class 9 track | 4′8
1/4″ | 4′9
1/4″ |
1/2″ |
[63 FR 34029, June 22, 1998, as amended at 78 FR 16104, Mar. 13, 2013]