49 CFR 213.143 - Frog guard rails and guard faces; gage.
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The guard check and guard face gages in frogs shall be within the limits prescribed in the following table—
|Class of track||Guard check gageThe distance between the gage line of a frog to the guard line 1 of its guard rail or guarding face, measured across the track at right angles to the gage line 2, may not be less than—||Guard face gageThe distance between guard lines 1, measured across the track at right angles to the gage line 2, may not be more than—|
|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 5/8 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.|
|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||4′61/2″||4′ 5″|
Title 49 published on 2014-10-01
no entries appear in the Federal Register after this date.