What are the types of rail joints?

A rail fish plate is a steel joint bar whose primary purpose is to maintain geometric continuity of the track by holding rail ends in correct relative position under repeated axle loads. GNEE RAIL offers fish plates compatible with GB light rail and heavy rail, UIC50/54/60, DIN536 A55–A120 crane rails, QU70–QU120 crane rails, JIS rails, AS1085 sections, BS11 profiles, and AREMA/ASCE standards, supported by installation reference data.

What are the types of rail joints?

Types of Rail Joints According to Position of Sleepers

Suspended Rail Joint:

A suspended rail joint is a type of railway track connection where the rail ends are positioned between two sleepers rather than directly on top of them. As the most widely used joint in railway construction, it offers better flexibility but requires more frequent maintenance due to increased wear, tear, and fastener fatigue caused by bending.

Supported Rail Joint:

A supported rail joint is a track configuration where the rail ends are placed directly on a single, dedicated sleeper, often called a "joint sleeper". Primarily used to minimize rail end deflection and wear by eliminating cantilever action, this design is less common today as it creates a rigid joint that can lead to excessive maintenance and a rough ride.

Bridge rail joint:

Bridge joints: a rail joint which is similar to the suspended joint. Compared with the suspended joint, on either side of bridge joint are connected by means of a metal flat or a corrugated plate known as a bridge plate. This type of joint is not commonly used on Indian railway.

Types of Rail Joint According to the Position of Joint

Square Rail Joint :

A Square Rail Joint occurs when rail joints on parallel tracks are positioned directly opposite one another. Commonly used on straight tracks, this configuration simplifies installation but can cause greater impact and vertical vibration on sleepers compared to staggered joints.

Staggered Rail Joint:

A staggered rail joint is a railway track configuration where joints on one rail are positioned opposite the center of the solid, continuous opposite rail, rather than aligning with each other. Primarily used on curved tracks, this method reduces centrifugal force, minimizes impact loading, and improves ride quality.

Types of Rail Joints According to the Performance and Application

Ordinary Rail Joint:

An ordinary rail joint, or bolted joint, is a standard, cost-effective connection for joining two rail ends, typically using splice bars (fishplates) and bolts. These joints are used on standard and non-standard rails, usually featuring 4 or 6 holes, to maintain track alignment, allow for thermal expansion, and ensure safe train operation.

Compromise Rail Joint:

A compromise rail joint is a specialized rail connector designed to join two railway tracks of different sizes, profiles, or weights while aligning the running surface and gauge sides. These joints, or "compromise fishplates," use varying, non-standard shapes on each end to connect mismatched rails securely, reducing maintenance costs and smoothing transitions.

Conductive Rail Joint:

A conductive rail joint is a connector for joining steel rails while ensuring electrical continuity for traction current, signaling, or grounding. Unlike insulated joints, these joints are made of conductive materials (typically steel or with added electrical bonds) to allow current to pass between rail sections.

Insulated Rail Joint:

Insulated Rail Joints (IRJs) are specialized, high-strength rail connectors used to electrically isolate sections of track for signaling and train detection systems. By inserting insulating materials (polymers or fiberglass) between rail ends and plates, they prevent short circuits, enhancing safety. These crucial components are often used in continuous welded rail (CWR) to maintain structural integrity.

Welded Rail Joint:

A welded rail joint is a structural connection formed by fusing two rail ends together using methods like Flash Butt Welding, Thermite Welding, or Gas Pressure Welding. These joints eliminate the gaps found in traditional bolted rail, enabling the creation of Continuous Welded Rail (CWR), which enhances train stability, reduces maintenance costs, and minimizes noise and vibration.

Frozen Rail Joint (Rail Joint Bar, Rail Fishplates):

A frozen rail joint occurs when high friction or tight, corroded fishplates (joint bars) prevent the rail ends from expanding or contracting, effectively locking them in place. While intended to prevent gap issues, frozen joints often cause severe stress, breaking, or misalignment, acting similarly to Continuous Welded Rail (CWR) without proper anchoring.

Expansion Rail Joint (i.e. temperature regulators):

A Rail Expansion Joint (REJ) or "breather switch" is a specialized track component that allows longitudinal movement of rails due to temperature changes or structural shifts on bridges, preventing breakage or track buckling. They consist of overlapping, tapered tongue and stock rails that provide a continuous, smooth surface for wheels while accommodating movements often up to ±200mm.

Founded in 2008, GNEE RAIL is a leading global manufacturer and supplier of railway components, specializing in high-quality rail fish plates (joint bars/splice bars) with strong production capacity and global service capabilities.

Our rail fish plate portfolio is comprehensive and compliant with international standards including UIC, AREMA, BS, DIN, and GB, covering light rail (8kg-30kg), heavy rail (38kg-75kg), and crane rail (QU70-QU120) systems. We offer diverse types such as insulated joint bars, bulged fish plates, and compromise rail joints,with precise specifications (4-hole/6-hole, 24-inch/36-inch), ensuring excellent mechanical performance.We uphold strict quality control supported by ISO 9001:2015 certification, an in-house inspection center, and third-party audits by SGS and BV. Our one-stop service includes customization, production, packaging, and after-sales support, tailored to clients' project needs.

Click here to obtain the detailed product catalog of GNEE RAIL.