A Joggled Fish Plate is a specialized type of fish plate (rail joint plate) used in railway track construction and maintenance. The design of a joggled fish plate includes an offset or “joggle” that allows it to fit over two rail ends that may not be perfectly aligned. This feature helps in accommodating any discrepancies in rail alignment while providing a secure and stable joint.
Key Features of Joggled Fish Plates:
- Design:
- Joggle Feature: The distinguishing characteristic of joggled fish plates is the offset in their design. This joggle helps to compensate for minor misalignments between the two rail ends.
- Material: Typically constructed from high-strength steel, joggled fish plates are designed to endure the heavy loads and dynamic forces experienced by railway tracks.
- Weight:
- Joggled fish plates can come in various weights depending on the rail type and specifications. They are available in several sizes and thicknesses, similar to standard fish plates.
- Dimensions:
- Length: Common lengths for joggled fish plates typically range from 300 mm to 600 mm.
- Width: The width generally varies from 100 mm to 160 mm, depending on the rail profile.
- Thickness: Thickness usually falls between 20 mm and 30 mm, designed to withstand significant loads.
- Usage:
- Rail Jointing: Joggled fish plates are primarily used for joining rail sections in areas where there may be slight misalignment, ensuring that the rails are properly connected and supported.
- Applications: They are particularly useful in sections of track where thermal expansion, track settling, or minor geological shifts may cause misalignment.
- Fastening:
- Joggled fish plates are secured to the rail ends using bolts and nuts, similar to standard fish plates. The joggle allows for a more secure fit, even if the rail ends are not perfectly aligned.
