Description
Technical Parameters
Fish Plate Models & Specifications
Fish plate models are classified by the rail type and weight they are designed to connect. Their "model" is derived from the rail section they match.
| Model (Based on Rail Section) | Compatible Rail Size (kg/m) | Typical Length (mm) | Material & Finish | Number of Holes | Joint Type |
|---|---|---|---|---|---|
| 40kg/m Rail Fish Plate | 40 | 600 | Q235B Steel, Hot-Dip Galvanized | 4 or 6 | Standard |
| 50kg/m Rail Fish Plate | 50 | 600 | Q235B Steel, Hot-Dip Galvanized | 6 | Standard |
| 60kg/m Rail Fish Plate | 60 | 800 | Q235B / Q345B Steel, Galvanized | 6 | Standard |
| 75kg/m Rail Fish Plate | 75 | 1000 | Q345B Steel, Galvanized | 6 | Heavy Duty |
| CR73 Crane Rail Fish Plate | QU70 / AU70 | Custom | Alloy Steel, Galvanized | 4 | Crane Rail |
| Insulated Fish Plate | 50 / 60 / 75 | 600 / 800 | Steel core with Nylon or Composite insulation | 6 | Insulated |
Application and Comparison
| Feature | Fish Plate (Joint Bar) | Welded Rail (CWR) |
|---|---|---|
| Primary Function | To splice and connect the ends of two adjacent rail sections. | To eliminate joints by creating a single, continuous rail segment. |
| Component Type | Joining component. | Fabrication/Construction method. |
| Ride Quality | Poor. Creates impact, noise, and vibration ("click-clack" sound). | Excellent. Smooth and quiet ride. |
| Structural Integrity | Creates a weak point in the track. | Creates the strongest, most continuous structure. |
| Maintenance Requirement | High. Bolts can loosen; joint and sleepers degrade faster. | Very Low. Minimal maintenance due to lack of joints. |
| Typical Application | Older networks, sidings, insulated joints (for signaling), expansion joints. | Modern mainlines, high-speed rail, and heavy-haul corridors. |
| Key Advantage | Allows for thermal expansion/contraction. Essential for repairs and insulated joints. | Provides superior strength, longevity, and ride quality. |
| Key Disadvantage | High maintenance and reduces overall track strength. | Requires management of thermal stresses (risk of buckling). |
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