Description
Technical Parameters
Rail Fish Plate
| Aspect | Description |
|---|---|
| Primary Function | To splice and connect the ends of two adjacent rail sections, forming a mechanical joint. |
| Key Roles | - Load Transfer: Transmits vertical and lateral forces from train wheels across the joint. - Maintain Alignment: Holds rail ends in proper vertical and horizontal alignment to ensure correct track level and gauge. - Provide Continuity: Creates a continuous running surface for train wheels. - Electrical Conductivity: Often provides electrical continuity for track circuit signaling systems. |
| Mechanical Principle | A bolted connection that clamps onto the rail web (waist) of two abutting rail ends, constraining them. |
| Forces Managed | Vertical (bending), Lateral (horizontal shift), and Longitudinal (limited creep). |
| Key Advantage | Allows for thermal expansion/contraction. Essential for repairs, insulated joints, and expansion points. Relatively simple to install and replace. |
Comparison with Other Railway Components
| Feature | Rail Fish Plate | Welded Rail (CWR) | Rail Fastener (e.g., Clip, Spike) |
|---|---|---|---|
| Primary Function | Joining rail ends. | Eliminating joints by creating a continuous rail. | Fastening the rail to the sleeper. |
| Component Type | Splicing / Joining device. | Fabrication / Construction method. | Fastening / Restraining device. |
| Impact on Ride Quality | Poor (creates bump and noise). | Excellent (smooth and quiet). | N/A (works with either jointed or CWR). |
| Structural Integrity | Creates a weak point. | Creates the strongest, most continuous structure. | Provides base stability for the track. |
| Maintenance Requirement | High. | Very Low. | Varies (Low for clips, High for spikes). |
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