49 C.F.R. § 213.141 Self-guarded frogs.
Title 49 - Transportation
(a) The raised guard on a self-guarded frog shall not be worn more than three-eighths of an inch. (b) If repairs are made to a self-guarded frog without removing it from service, the guarding face shall be restored before rebuilding the point.
Title 49: Transportation
PART 213—TRACK SAFETY STANDARDS
Subpart D—Track Structure
§ 213.141 Self-guarded frogs.
