Fishplates

Fishplates, also known as joint bars, are metal components used to connect two rails together in a railway track. They are typically forged from steel and are designed to fit tightly against the web and head of the rails, bridging the gap between their ends. The primary function of a fishplate is to provide structural continuity, allowing the rails to transmit both longitudinal and transverse forces. This ensures that the track remains stable and capable of supporting the weight of passing trains. Fishplates are secured to the rails by bolts that pass through holes in the plates and the web of the rails. These bolts are usually tightened to a specific torque to maintain the necessary pressure and connection. The design and material of fishplates are critical for the safe and efficient operation of railways, as they must withstand significant stress and fatigue over time. Over the years, various designs of fishplates have been developed to improve their performance and durability, including different shapes and methods of fastening. Their presence is fundamental to the integrity of any continuous welded rail track, as well as for jointed rail tracks where they are essential for maintaining alignment and load transfer.