Second Life for Steel: The Rise of Circular Bridges

A shift is underway in civil engineering as reuse—not just recycling—of steel becomes a cornerstone in sustainable infrastructure. A recent UK report, Steel Reuse in Bridges by Expedition Engineering, outlines how structural steel from existing bridges can be repurposed, saving up to 97% of embodied carbon compared to new steel. This strategy significantly reduces emissions, waste, and costs while preserving material value. The report outlines three primary reuse pathways: whole-span relocation, repurposed surplus steel from other industries, and reclaimed steel from demolished assets. One case study—Paris’s Lucie Bréard footbridge—exemplifies how existing bridge spans can be adapted to new uses with minor modifications and rigorous inspection.

Meanwhile, in the Netherlands, the Directorate-General for Public Works and Water Management (Rijkswaterstaat) is implementing a groundbreaking circular initiative. By 2030, 80% of bridge components are expected to be reused. The National Bridge Bank is connecting supply and demand for reusable elements, while a circular yard in Dordrecht will temporarily house and refurbish structural components like steel spans and concrete beams. Already, projects such as the Keizersveerbrug on the A27 and viaducts on the A9 are proving how steel and concrete can enjoy a productive second life. All refurbishing operations will be conducted in noise-controlled environments to minimize community impact.

Both the UK and the Netherlands are demonstrating that steel reuse in bridges is not just possible—it’s practical, cost-effective, and vital for climate resilience. Challenges remain, such as certification, fatigue life assessments, and design adaptations, but forward-thinking policy, engineering innovation, and collaboration are paving the way for widespread adoption. With strong leadership and global examples, reused steel is set to become a critical material in the future of infrastructure.