Description
Technical Parameters
Rail Dog Spike Fastening System
The Railway Dog Spike is a traditional driven fastener used to anchor rail base plates or rails directly to wooden sleepers. Made from mild carbon steel with a distinctive offset head, it relies on frictional resistance within a pre-bored hole for holding power. This spike is driven flush using a spike maul and removed with a claw bar. Its simple design enables rapid track installation for low-speed and temporary railways.
Technical Specifications:
| Parameter | Specification |
|---|---|
| Product Type | Railway Dog Spike – Cut Spike Fastener |
| Steel Grade | Q235 / ASTM A36 / Low carbon steel |
| Shank Shape | Square with rounded corners, tapered point |
| Head Design | Offset L-shape with two gripping lugs |
| Standard Lengths | 5.5", 6.0", 6.5" (140, 152, 165 mm) |
| Shank Width | 5/8" (16 mm) nominal |
| Point Angle | 20° – 30° wedge taper |
| Hardness | 70 – 85 HRB (no heat treatment) |
Installation & Maintenance Perspective:
- Requires pilot hole diameter smaller than spike shank for proper grip.
- Driven vertically using single heavy blow from spike maul tool.
- Stopped when head contacts rail base or tie plate surface.
- Misaligned spikes extracted and re-driven into corrected position.
- Installation speed reaches hundreds per hour with experienced crew.
Maintenance & Operational Perspective
- Compresses wood fibers radially outward creating permanent friction grip.
- Holding power decreases as wood dries, shrinks, or decays over time.
- Splits may develop if pilot hole too small or spike poorly aligned.
- Hardwood sleepers provide significantly higher withdrawal resistance than softwood.
- Repeated driving in same hole progressively reduces holding capacity.
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