Description
Technical Parameters
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Rail Dog Spike Fastening System
The Railway Dog Spike is a traditional cut-spike fastener, forged from low-carbon steel, designed for securing steel rail to wooden crossties through frictional engagement and elastic wood fiber displacement. Its distinctive L-shaped geometry features a tapered, chisel-point shaft that splits wood fibers rather than cutting them, creating a dense fiber matrix that clamps the spike shank under sustained compression.
Technical Specifications:
| Parameter | Specification | Performance Characteristic |
|---|---|---|
| Material Grade | Low-carbon steel (ASTM A65 / similar) | Forged, annealed for ductility |
| Nominal Dimensions | Length × shank diameter | 5.5" – 6.0" × 5/8" – 3/4" typical |
| Withdrawal Resistance | Initial installation | 2,500 – 4,500 lbs per spike |
| Corrosion Protection | Mill scale / optional coating | Black oxide or galvanized finish available |
| Application Environment | Timber-tie track | Branch lines, industrial spurs, transit, heritage railways |
Installation & Maintenance Perspective:
- Chisel-Point Geometry: The diamond-shaped tip sections wood fibers during driving, creating a natural spring-back effect that increases withdrawal resistance without requiring threads or supplemental anchoring.
- Offset Head Configuration: The laterally displaced head provides a dedicated driving surface aligned with the spike axis while creating a positive rail-bearing interface that prevents the spike from shearing under lateral loads.
- Tapered Shank Profile: Gradual dimensional reduction from head to point ensures progressive wood compression, maximizing frictional engagement along the full embedment depth.
Maintenance & Operational Perspective
- Fiber Displacement Retention: The spike operates by displacing rather than removing wood fibers, creating a pre-stressed condition that maintains clamping force even as wood undergoes seasonal moisture cycling.
- Creosote Compatibility: Shank surface finish is optimized for use with preservative-treated ties, ensuring consistent friction coefficients without accelerating preservative leaching.
- Annular Ring Engagement: Installation technique aligns the spike with wood grain orientation to maximize engagement with the tie's annular growth rings, optimizing withdrawal resistance.
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