Hey there! As a supplier of Rail Fish Plates, I often get asked about the standard size of these crucial railway components. So, let's dive right in and explore what the standard sizes are all about.
Rail fish plates, also known as joint bars, play a vital role in the railway system. They are used to connect two sections of rail together, ensuring a smooth and continuous track for trains to run on. The standard size of rail fish plates can vary depending on several factors, including the type of rail, the load capacity, and the specific railway standards in different regions.
Types of Rails and Their Corresponding Fish Plate Sizes
There are different types of rails commonly used in railways, such as 43 kg rails, 50 kg rails, and 60 kg rails. Each type of rail has its own standard size of fish plates designed to fit it perfectly.

43 kg Rails
Fish plates for 43 kg rails are typically designed to match the dimensions of these rails. The length of the fish plate is usually around 600 - 700 mm. The width and thickness are also carefully calibrated to ensure a proper fit and connection. The width might be around 100 - 120 mm, and the thickness could range from 18 - 22 mm. These dimensions are crucial as they determine how well the fish plate can hold the rails together and withstand the forces exerted by passing trains.
50 kg Rails
For 50 kg rails, the fish plates are larger in size compared to those for 43 kg rails. The length of the fish plate can be around 700 - 800 mm. The width is usually in the range of 120 - 140 mm, and the thickness can be between 20 - 24 mm. This increase in size is necessary to handle the greater weight and stress associated with 50 kg rails.
60 kg Rails
The Fish Plate For 60 kg Rail is even more robust. The length of these fish plates is often around 800 - 900 mm. The width can be 140 - 160 mm, and the thickness is typically 22 - 26 mm. These larger dimensions are essential to support the heavy loads and high - speed traffic that 60 kg rails are commonly used for.
International and Chinese Standards
Different countries have their own railway standards, which also affect the size of rail fish plates. In China, for example, the Chinese Standard Rail Fish Plate follows specific guidelines. Chinese standards ensure that the fish plates are of high quality and are suitable for the country's vast railway network.

The Chinese standard takes into account factors like the local climate, the type of trains used, and the expected traffic volume. For instance, in regions with extreme temperatures, the fish plates need to be able to expand and contract without losing their connection to the rails. Chinese - standard fish plates are designed to meet these requirements, and their sizes are carefully determined based on these considerations.
Factors Affecting the Standard Size
Load Capacity
The load capacity of the railway is a major factor in determining the size of the fish plates. If a railway is expected to carry heavy freight trains, the fish plates need to be larger and stronger to handle the additional weight. On the other hand, for light - rail systems or tramways, smaller fish plates might be sufficient.
Track Curvature

The curvature of the track also plays a role. In areas where the track has sharp curves, the fish plates need to be able to flex slightly to accommodate the change in direction. This might require different sizes or designs of fish plates compared to straight sections of the track.
Speed of Trains
High - speed railways demand fish plates that can withstand the dynamic forces generated by fast - moving trains. The size and strength of the fish plates are adjusted accordingly to ensure the safety and stability of the track.
Why Standard Sizes Matter
Using the correct standard size of rail fish plates is crucial for several reasons. Firstly, it ensures a proper fit between the fish plate and the rails. A proper fit means that the connection is strong and stable, reducing the risk of derailment. Secondly, standard sizes make it easier to replace fish plates when they wear out or get damaged. Since they are standardized, it is easier to source replacement parts, which helps in maintaining the railway infrastructure efficiently.
Our Offerings as a Supplier
As a Rail Fish Plate supplier, we understand the importance of providing high - quality products that meet the standard sizes. We offer a wide range of Railway Fish Plate options, including those for different types of rails and various railway standards. Our fish plates are made from high - quality materials, ensuring durability and reliability.




We have a team of experts who can help you choose the right fish plates for your specific needs. Whether you are building a new railway, upgrading an existing one, or just need to replace some worn - out fish plates, we've got you covered.
Contact Us for Procurement
If you're in the market for rail fish plates, don't hesitate to reach out. We're here to assist you with all your procurement needs. We can provide detailed information about our products, their sizes, and how they can fit into your railway project. Whether you have questions about the standard sizes or need advice on which type of fish plates to choose, our team is ready to help.
References
- Railway Engineering Handbook
- International Railway Standards Publications
- Chinese Railway Industry Standards Documents
