[Code of Federal Regulations]
[Title 49, Volume 4]
[Revised as of October 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR213.137]

[Page 112]
 
                        TITLE 49--TRANSPORTATION
 
       CHAPTER II--FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF 
                             TRANSPORTATION
 
PART 213--TRACK SAFETY STANDARDS--Table of Contents
 
                       Subpart D--Track Structure
 
Sec. 213.137  Frogs.

    (a) The flangeway depth measured from a plane across the wheel-
bearing area of a frog on Class 1 track shall not be less than 1\3/8\ 
inches, or less than 1\1/2\ inches on Classes 2 through 5 track.
    (b) If a frog point is chipped, broken, or worn more than five-
eighths inch down and 6 inches back, operating speed over the frog shall 
not be more than 10 m.p.h..
    (c) If the tread portion of a frog casting is worn down more than 
three-eighths inch below the original contour, operating speed over that 
frog shall not be more than 10 m.p.h..
    (d) Where frogs are designed as flange-bearing, flangeway depth may 
be less than that shown for Class 1 if operated at Class 1 speeds.