A railroad frog is a vital device in railroad track systems that enables train wheels to shift smoothly from one track to another by bridging the gap where two rails intersect. Below is a concise glossary post, clearly defining key terms and concepts related to railroad frogs.
This specialized track component, also called a “common crossing”, allows train wheels to move from one rail track to another at crossings or switches. It is engineered to support wheels and prevent derailment as they traverse the gap between rails.
Main Parts:
- Crossing Nose: The point where rails intersect, which takes the direct impact from passing wheelsets.
- Wing Rails: Guide rails leading up to and away from the crossing nose. They support the wheels as they roll through the intersection.
- Guardrail: A rail installed alongside the running rails and opposite the frog at a switch or crossing. Its primary purpose is to guide train wheels correctly through the frog section, ensuring the wheels stay aligned with the intended flangeway and preventing derailments as trains pass over the gap between rails.
A Railroad Switch allows trains to move from one track to another, including switch points, closure rails, frogs, and guard rails. Frogs are essential for enabling safe transitions at track intersections.
FAQ about Railroad Frogs
A railroad frog is a track component that allows train wheels to transfer smoothly from one rail to another at intersections or switches, supporting the wheels to prevent derailment
The frog is positioned where rails cross. The wheel runs on the wing rail and is transferred onto the frog point for a safe crossing, with the design ensuring the wheel does not drop into the gap between rails
There are fixed frogs—such as combined and one-piece cast frogs—and movable point frogs, which eliminate gaps at crossings, increase service life, and reduce maintenance costs
Movable point frogs provide a continuous running surface for train wheels, eliminating gaps and allowing higher speeds through switches while reducing wear and extending longevity
SafeRack’s Role in Rail Safety
SafeRack delivers worker safety solutions for railcar access, fall prevention, and specialized equipment integration. Services include on-site safety assessments, equipment integration, compliance guidance, and preventative maintenance—all helping to ensure seamless, safe transitions at rail intersections like those involving railroad frogs.
SafeRack acts as a consultative partner by providing:
- On-site safety walks and compliance audits for rail operations
- Technical guidance for optimal, compliant integration of loading terminals, crossing and railcar access and fall protection equipment
- Maintenance strategies to extend the service life of critical track infrastructure, including railroad frogs.
