Good steel makes a difference – how we build sustainably in Linköping

In our new development at Mappen 4 in Linköping, we are investing in innovative and sustainable steel solutions. By combining reused columns and scrap-based steel, we can reduce the building’s overall climate impact.

Publicerad 2025-09-03

At the Mappen 4 property in Linköping, we are constructing a logistics facility for San Sac AB. The building will cover 10,000 sqm and is scheduled for completion in 2026. The project is being certified according to BREEAM with a rating of Excellent as well as NollCO₂, with a strong focus on climate-smart materials. One area where we have taken significant steps forward is steel – a material well suited for several of the main elements in a logistics building, and where we now clearly demonstrate how climate impact can be reduced.

Five of the building’s load-bearing columns are reused. After being dismantled from their previous location, they underwent thorough quality control by Stena Stål before gaining a new life in our project. The remaining columns and beams in the structure consist of nearly 100% scrap-based steel, which has a significantly lower climate footprint compared to primary raw material.

For the roof sheeting and sandwich panels for the exterior walls, we have taken another step by using SSAB Zero, a relatively new steel on the market. It is produced from recycled scrap melted in an electric arc furnace, entirely without fossil fuels. The steel offers the same technical performance as conventional steel, but with more than a 70% reduction in climate impact.

By combining fossil-free production, scrap-based materials, and reuse, we reduce the building’s total climate impact by approximately 850,000 kgCO₂e, corresponding to 85 kgCO₂e/m² GFA. In addition, further carbon-reducing measures are being implemented, such as climate-improved concrete, interior walls of cross-laminated timber (CLT), and reuse – ensuring that we meet both NollCO₂’s and Catena’s own thresholds for greenhouse gas emissions.