How do you choose the right aluminium bridge decking for your next project? We offer support on isotropic and orthotropic deck solutions that reduce weight, speed up installation, and minimize maintenance compared to steel and concrete. Below, you will learn more about aluminium in bridges, technologies, use cases and more.
We offer support on two aluminium bridge decking technologies:
The two bridge technologies have been successfully tried and tested on bridge deck projects for decades, and evaluations funded by the U.S. Federal Highway Administration show that aluminium decking is viable for many bridge applications.
Compared to materials like steel and concrete, aluminium bridge technologies offer a strong alternative because they make rehabilitation faster and less disruptive, especially with panelized, pre-assembled decks that allow short closures and staged installation.
Their low self weight preserves existing substructures and can even make it feasible to widen older bridges without major foundation work. Aluminium also stands up well in tough environments, de-icing salts, coastal air, and industrial atmospheres, which cuts corrosion risk and reduces maintenance needs.
Fewer repairs and easier panel replacement translate into lower lifecycle costs than steel or concrete, and the material supports sustainability thanks to high recycled content potential and full recyclability.
In October 2025, The Norwegian Public Roads Administration opened “Hangarbrua,” a 55 meter by 9-meter network arch pedestrian and cycle bridge built by Leirvik with Hydro and partners. Made entirely from recycled aluminium taken from the decommissioned Gyda oil platform, the 60 tonne structure was assembled off site and lifted into place over the railway at Leangen station in a single operation, showing how low weight can simplify installation.
A life cycle assessment by COWI found that using recycled post-consumer aluminium reduced CO₂e emissions by about 70% versus a stainless steel alternative, including end of life recycling potential. Hydro produced new extruded profiles from the recycled metal, some joined with friction stir welding and the bridge’s corrosion resistance supports minimal maintenance over time. Hangarbrua now forms a key link in Trondheim’s walk and bicycle route, improving connectivity while demonstrating circular construction in practice.
Indoor, outdoor and marine environments all make different demands on an alloy. Outdoor and coastal exposure puts corrosion resistance at the top of the list, which changes the shortlist significantly compared to a controlled indoor application.
If the profile will be anodized, surface finish quality becomes a primary selection criterion, because not all alloys respond equally well to anodizing. Painted profiles are more forgiving, and mill finish applications open up the field further.
This determines whether you're looking at a general-purpose alloy or something from the higher end of the strength range. A decorative trim profile and a structural load-bearing component will land in very different places on the alloy list.
Waterproof membranes with asphalt or resin overlays are commonly used, with anti-skid treatments as needed.
Yes. Aluminium is infinitely recyclable and supports circular project goals.
Apply regional bridge design codes and project specific testing/certification. Feel free to contact us for guidance.
