(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—

Open Table
Class of track The gage must be at least— But not more than—
Excepted track N/A 41014 .
Class 1 track 48 410.
Class 2 and 3 track 48 4934 .
Class 4 and 5 track 48 4912 .

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