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Mixed-material ‘floating floor’ for more comfortable rail cars


Sapa and Getzner Werkstoffe have combined their respective material expertise in a lightweight “floating floor” that can help make passenger train travelers more comfortable on their journeys. The companies are now bringing the product to the rail market.

Mixed-material floating floor for more comfortable rail cars

Sapa and Getzner are market leaders in aluminium and compounds, respectively. Their joint development has resulted in thin-walled floating floors with maximum noise level reduction and vibration mitigation. Sapa’s extrusions provide the elastic bearing in the floor construction, and the polyurethane core Sylomer® prevents vibration transfer from the car body within the rail car cabin.

The compound profiles are mainly used for flooring in passenger trains.

“The rail market is using more aluminium in more applications. This shows we are thinking outside the box in combining two stand-alone products to create an innovative product solution that reduces weight and increases passenger comfort. It is a solution that provides real value,” says executive vice president John Thuestad, who is responsible for Sapa’s aluminium extrusion operations in Europe.

In high-speed train car bodies, aluminium offers light weight, strength, and a uniform and smooth surface. There are no “waves” in the metal, as with steel, meaning less finishing work after assembly. Furthermore, assembly in modular fashion is more cost effective than the assembly of many smaller and heavier components. Applications include train sideboards, roof, cant rails and floor panels.

The floating floor uses specially constructed aluminium profiles around the Sylomer® core. This construction allows the top flooring to move around without direct connection to the base part of the profile – the only connection between the two main parts of the construction is the compound core.

Technical benefits and advantages

- Aluminium profile for easy assembly, leading to reduced processing time
- Re-design of aluminium profiles to customer needs
- Thinner-walled floor
- Tolerances of rail car body can be compensated
- Polyurethane Sylomer® inlay for efficient vibration mitigation
- Lower noise level within rail cars
- Meets  fire safety standards and is crash safe

About Sapa
Sapa is the leader in innovative aluminum solutions and has 22,800 employees in more than 40 countries. It is headquartered in Oslo, Norway. The company delivers solutions to all industries, from automotive and mass transportation to building and construction, electronics, offshore and maritime. Sapa is a 50/50 joint venture owned equally by the Norwegian companies Orkla and Hydro.

About Getzner
Established in Bürs, Austria, in 1969, Getzner is a specialist in vibration protection solutions for the railway, construction and industry sectors. Its high-tech polyurethane materials Sylomer®, Sylodyn® and Sylodamp® are among the leading vibration isolation materials on the international market.


Hubert Ronecker
Sales Director Germany
Tel: +43 664 817 1910

Hilde Kallevig
VP External Communications
Tel: +47 907 28 052