How do railroad spikes work

Rail spikes, as one of the most fundamental railway fasteners, are mainly divided into Dog Spikes (Cut Spikes) and Screw Spikes. Both types function to firmly secure rails to sleepers, maintaining the stability of the track structure.

Dog spikes typically have a square or flat shank and are installed by hammering directly into wooden sleepers. The head of the spike is shaped like a "dog head," pressing tightly against the rail tie plate to prevent longitudinal and lateral rail movement. They rely on friction and bite between the shank and the wooden sleeper to resist train-induced tensile and impact forces. Dog spikes are quick to install and cost-effective, but their pull-out resistance is relatively limited, making them more prone to loosening under heavy-load or high-speed conditions.

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Screw spikes, in contrast, feature a threaded shank and are installed by screwing into wooden sleepers or pre-embedded sleeves. The threaded design provides stronger mechanical locking, significantly improving pull-out resistance and vibration performance. Screw spikes effectively prevent rail movement caused by train vibrations and thermal expansion or contraction, making them more widely used in medium- to heavy-load railway lines.

In practice, rail spikes work together with other components of the track fastening system. For example, they are often used with rail pads to distribute train loads and may be combined with fishplates, rail anchors, and other fasteners to further enhance track stability.

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GNEE RAIL offers a full range of dog spikes and screw spikes and can provide custom solutions based on specific track conditions. The company also supplies complementary fasteners such as fishplates, rail anchors, and rail bolts, helping customers achieve safe, efficient, and long-lasting railway track operation.