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Expansion Joints
In the world of rail transport, where every second counts and safety is non-negotiable, metallic expansion joints become key components to ensure structural integrity and comfort in traffic. At Insametal, we specialize in the design and manufacture of metal joints for railway tracks, adapted to all types of structures and service conditions.
Why are expansion joints necessary in railways?
Railway tracks are subjected to constant expansions and contractions due to temperature variations, dynamic loads from railway traffic, and structural movements in bridges, viaducts, or overpasses. Without expansion joints, these deformations could cause:
- Misalignments in the track
- Dangerous internal stresses
- Damage to rails and fastenings
- Risk to train traffic
Metallic expansion joints allow these movements to be absorbed in a controlled manner, maintaining structural continuity, geometric stability, and the safety of railway traffic.
Metal joints designed to last
At Insametal, we develop metallic expansion joints tailored to the technical needs of each project, whether for conventional lines, high-speed rail, or urban trams. Our products are characterized by:
- Custom design, calculated according to track type, loads, and expected movement range
- High-strength materials, such as structural steel and components treated to withstand fatigue, vibrations, and atmospheric agents
- Easy integration into the track, compatible with direct fastening systems or slab track
- Precise industrial manufacturing, under UNE standards and specifications from organizations such as ADIF or UIC
Additionally, we incorporate elements such as guides, expansion stops, or sealing devices to ensure long-lasting performance even in demanding environments.
Common applications
Our metallic expansion joints are installed in:
- Railway bridges and viaducts
- Overpasses and underpasses
- Lines with slab track or without ballast
- Areas with high thermal amplitude
- Infrastructures requiring electrical, mechanical, or both types of continuity
For more information on the technical requirements applicable to this type of structure, you can consult the ADIF Specific Technical Specifications (IF-510) regarding expansion joints and bearing devices on railway bridges.
Do you have a railway project underway?
At Insametal, we help you design and manufacture the expansion joint that best fits your structure. Consult with our technical team and discover how our metallic solutions can make a difference in your infrastructure.
📞 Contact us or request a quote without obligation
Frequently Asked Questions (FAQs)
What is an expansion joint and what is its purpose on a railway track?
An expansion joint is a mechanical element that absorbs movements caused by thermal expansion, dynamic loads, or structural shifts in railway infrastructures. Its purpose is to maintain track continuity and prevent damage to rails or the bridge or viaduct structure.
What types of expansion joints exist in railways?
There are several types, such as sliding joints, modular joints, metal joints with guides, or rail joints with expansion devices. At Insametal, we manufacture customized metal joints tailored to the type of track (ballasted or slab), thermal range, and structural conditions of the project.
What materials are used in metallic expansion joints?
Mainly structural steel, treated to resist fatigue and corrosion. Auxiliary elements such as elastomers, expansion guides, sealing systems, or high-precision welded components are also incorporated.
Where are expansion joints placed in a railway infrastructure?
They are installed in areas where relative movements may occur, such as railway bridges, overpasses, viaducts, areas with sudden temperature changes, or structures with slab track. They are essential to ensure the durability and safety of the track.
Which companies manufacture expansion joints for railways in Spain?
Insametal is one of the specialized manufacturers of metal expansion joints for railways in Spain. We design and manufacture custom solutions for railway projects, complying with ADIF regulations and other European standards. Our experience includes high-speed rail, conventional lines, and urban trams.
Can I order a custom-made expansion joint?
Sí. En Insametal diseñamos juntas a medida según los requerimientos técnicos del cliente: tipo de vía, cargas de tráfico, movimientos estructurales, condiciones climáticas y
