What are the different types of joints in railway track?
Jan 28, 2026
A rail fish plate is a precision-machined steel connector designed to clamp the rail web area with bolts, forming a rigid mechanical joint that keeps two rail sections aligned in height, gauge, and direction. Its structural role is to compensate for the discontinuity of rail material at joints.
GNEE RAIL provides fish plates compatible with rail profiles such as UIC50, UIC54, UIC60, DIN A65/A75/A100, QU70–QU120 crane rails, and AREMA profiles, offering coordinated delivery of rails, bolts, joint bars, and installation guidance.
What are the different types of joints in railway track?
Railway track joints connect rail ends, ensuring structural continuity and allowing for thermal expansion. Key types include supported (joint on a sleeper), suspended (joint between sleepers), bridge (supported by sleepers on both sides), staggered (staggered on opposite rails), insulated (for signaling), and compromise (connecting different rail sections).
Types of Rail Joints
- Supported Joints: The rail joint is directly supported on a single sleeper.
- Suspended Joints: The joint is suspended between two sleepers, offering better flexibility but higher stress.
- Bridge Joints: A variation of the supported joint where the joint is supported on two sleepers, one on each side, with a bridge plate, increasing stability.
- Staggered Joints (Alternate Joints): Joints on one rail are not directly opposite to the joints on the other rail, used to reduce vertical impact in certain track configurations.
- Square Joints (Opposite Joints): Joints are directly opposite each other, standard for straight, modern track.
- Insulated Joints: Used in track-circuited areas to electrically separate rail sections, using insulating materials between fishplates and rails.
- Compromise Joints: Used to connect rails of different weights or cross-sections, using specialized fishplates.
- Welded Joints: Continuous Welded Rail (CWR) eliminates the physical gap entirely, minimizing maintenance and improving ride quality.
- Joggled Fishplate Joints: Used as a temporary repair for cracked or broken welded rail joints.
- Buffer Joints (Expansion Joints): Used at the ends of long welded rails to accommodate large longitudinal movements.
| Joint Type | Key Specification / Description |
|---|---|
| Standard Rail Joint (Fish Plate) | - Profile: Matches the rail section (e.g., UIC 60, 136RE). - Length: Typically 600mm or 800mm per side. - Holes: 4 or 6 bolt holes per bar. |
| Insulated Rail Joint (IRJ) | - Material: Steel core with composite insulating end-posts/plates, or full epoxy composite. - Electrical Resistance: >10⁸ Ω. |
| Compromise Rail Joint | - Design: Connects two different rail profiles (e.g., UIC 54 to UIC 60). - Profile: Each side is machined to match its respective rail section. |
| Joggled Rail Joint | - Feature: Has a depressed (joggled) section to allow continuous rail head surface for smoother wheel passage. |
| Bridge Rail Joint | - Design: Often reinforced (thicker web/longer length) for high-stress locations like bridge approaches. |
| Glued Insulated Joint | - Construction: Steel bars bonded to composite insulation using high-strength adhesive for improved durability. |
| Welded Rail Joint (for CWR) | - Type: Flash-butt or thermite weld. - Specification: Weld must meet mechanical properties equal to or greater than the parent rail. |
| Expansion Joint (for BRE) | - Feature: Allows controlled thermal expansion in long rails on bridges or in extreme temperature zones. |
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.
