Spring spikes, also known as elastic rail spikes, are two-pronged U-shaped fasteners bent to resemble the letter M. These specialized spikes hold rails down to prevent tipping while securing baseplates to sleepers. Spring spikes are commonly used with flat-bottomed rails, baseplates, and wooden sleepers where elastic fastening properties are beneficial.
Overview of Rail Fastening Systems
Rail fastening systems have evolved from simple mechanical connections to sophisticated elastic fastening solutions that accommodate dynamic forces and thermal expansion. The development of spring-loaded fasteners represents a significant advancement in railway technology, improving track stability and reducing maintenance. These systems must balance holding power with controlled flexibility to ensure safe, reliable rail operations.
The M-shaped design of spring spikes provides elastic clamping force that maintains consistent rail pressure despite vibration and temperature changes. This flexibility helps extend component lifespan and reduce track maintenance requirements. SafeRack’s comprehensive approach to railroad safety includes OSHA-compliant access equipment, EPA-compliant spill containment, and expert consultation services for railcar loading facilities.
Learn more: Core Components of a Rail Fastening System | Railroad Construction Facts
Frequently Asked Questions
The M-shape creates two contact points with the rail base while the center peak provides spring tension. This design distributes clamping force evenly, allows controlled vertical movement under load, and maintains consistent pressure through thermal cycles that would loosen rigid fasteners.
Spring spikes must be driven to specific depths where the spring section maintains proper tension without bottoming out. Over-driving eliminates elasticity while under-driving provides insufficient clamping force. Proper installation leaves 10-15mm of spring travel for optimal performance.
Spring spikes excel in locations experiencing significant temperature variations, heavy axle loads with wooden sleepers, and transition zones between different track structures. Their elastic properties accommodate differential movement that would cause rigid fasteners to fail or require frequent adjustment.
