Table 1 to § 213.143(a)
Class of track | Guard check gage | Guard face gage |
The distance between the gage line of a frog to the guard line1 of its guard rail or guarding face, measured across the track at right angles to the gage line,2 may not be less than- | The distance between guard lines,1 measured across the track at right angles to the gage line,2 may not be more than- | |
Class 1 track | 4'61/8" | 4'51/4" |
Class 2 track | 4'61/4" | 4'51/8" |
Class 3 and 4 track | 4'63/8" | 4'51/8" |
Class 5 track | 3 4'61/2" | 4'5" |
1 A line along that side of the flangeway which is nearer to the center of the track and at the same elevation as the gage line.
2 A line five-eighths of an inch below the top of the center line of the head of the running rail, or corresponding location of the tread portion of the track structure.
3 See paragraph (b) of this section.
49 C.F.R. §213.143