Case Parkbosbruggen bridges

Minna Kalajoki


To find a simple, easily applicable and low-cost bridge deck reinforcement solution.


Outokumpu Forta duplex stainless steel was used on the edges of the concrete decks


Steel grade: Outokumpu Forta DX 2304
Form: Rebar

City for cyclists

Famous for its well-preserved and meticulously restored medieval architecture, the Belgian city of Ghent is also known as one of the cycling capitals of Europe. Bike paths connect the entire city and cyclists are very often put first.

The Parkbosbruggen project involves the construction of two bridges for pedestrians and cyclists: one over Ringway R4 and the waterway around it; the other over the busy E40 motorway. The two bridges are the last links of a bicycle highway from the southern part of Ghent to the center of the city.


Spiral of two windings

“The bridges will significantly facilitate everyday traffic to and from schools and workplaces. The bridges will also serve as an access point to Parkbos, the 1,200 hectare recreational area south of the city,” notes Project Manager Dirk Rombaut of the building company West Construct, which is part of the Besix group.

The ultramodern, slim bridges are constructed by concrete and reinforced by stainless steel. To the naked eye, the project is a relevant example of infrastructure that responds to both aesthetic and functional needs.

“One ramp of the E40 bridge is made from a concrete spiral of two windings, which makes its design rather special. The Ringway bridge is supported by two oval pillars and the bridge itself makes an eye-catching S-turn over the canal,” says Rombaut.


Reinforced for long life

Reinforced concrete combines low cost, versatility and high strength. Outokumpu’s stainless steel rebar was chosen for its durability and safety. Basically corrosion and maintenance free, stainless steel rebar is used to reinforce the concrete bridge decks to prevent corrosion and to protect the concrete from fracturing. Another selection factor was the small distance between the reinforcement and the surface of the concrete on the edges of the concrete decks.

Rombaut is happy with Outokumpu as the rebar supplier. Outokumpu was able to offer customized reinforcement solutions, combined with strong expertise. Altogether three tonnes of Forta DX 2304 duplex stainless steel is used for the bridge project.

Construction started in December 2016 and the project is expected to be completed in March 2018.

Recommended products and insights

How to build a bridge that saves a fortune

Our expert Andy Backhouse explains how the right grade of stainless steel can create a structure that resists corrosion and minimizes maintenance needs over a typical bridge lifetime.

Stainless steel for bridges

Bridge projects are in a class of their own – just like Outokumpu stainless steel. Marked by harsh environments, heavy lifetime usage and high aesthetic expectations, bridges demand special considerations upfront if they’re to go the distance.


The Forta range contains duplex and other high strength stainless steels that enable thinner structures and weight reduction (measured in Rp0.2 > 400 MPa. PRE 16 to 43).


Outokumpu offers a full range of stainless-steel rebar with high availability. 

Sheffield - SSRB, UK

Outokumpu’s Rod and Bar mill in Sheffield, UK is a global wire rod and bar supplier in a broad range of stainless steel grades, sizes, and shapes. The offering consists of round, hexagon and square wire rod and bars as well as Prodec superior machinability bars in small diameters.

Recommended reading

Case Plaza Tower Costa Mesa

LA’s Costa Mesa’s Plaza Tower still a shining beacon 30 years on

Case STILRIDE – Carbon footprint LCA

STILRIDE motors ahead with sustainable stainless steel


Reducing embodied carbon in buildings - Sustainable stainless steel attracts growi...


The global megatrends of urbanization and sustainability are driving new solutions...

Case Sodertalje bridge

Bridging the way to a more sustainable and economical future

Case DA Christie barbeques

Stainless steel central to the success of Australian public barbecues

Case Metalis waste bins

Rotterdam wastes no opportunity for sustainability

Case Temoco

Adding a sustainable touch to the Nordic’s leading bars

Case Imminkhuizen Metaaltechniek

Faster, more automated production is the future