What is the maximum allowable wear on the raised guard of a self-guarded frog according to FRA regulations?

The maximum allowable wear on the raised guard of a self-guarded frog according to FRA regulations is indeed 3/8 inch. This standard is set to ensure safety and functionality in railway operations. The raised guard is a critical component that helps prevent derailments and aids in the proper alignment of the wheels as they pass through the frog, which is the crossing element of the track.

Allowable wear measurements are specified to maintain the structural integrity of railway components. If the wear exceeds 3/8 inch, it could compromise the frog's ability to function effectively, potentially leading to unsafe conditions on the track. Monitoring and maintaining components like the raised guard is crucial for the overall safety of train operations, ensuring that they remain within the specified tolerances as per the regulations.