Over 140 years of experience in structural steel engineering, innovative designs and buildings and a highly motivated and competent workforce: Donges SteelTec GmbH in Darmstadt. Our company plans, manufactures and assembles architecturally sophisticated projects in the fields of steel bridge construction, steel structural engineering, as well as industrial facade and turnkey construction, and with its references, it is one of Germany’s market and technology leaders.
The history of the company can be traced back to 1872, when Georg Donges founded a locksmith business. After Donges was run as a medium-sized family-owned company for several generations, the Hitachi Group acquired the company’s business operations in 2008, thus securing expertise in steel construction for its international business involving the construction of coal-fired power plants. Since November 2017, Donges SteelTec has been part of the Munich-based Mutares Group.
With the acquisition of Kalzip in Koblenz (July 2018), Normek OY in Finland (February 2019) FDT Flachdach Technologie in Mannheim (March 2019), Norsilk SAS in France (June 2019) and Nordec OY in Finland the Donges Group repositions itself as a specialist supplier of steel bridges, steel structures, roof and wall solutions on the European market.
Donges is continuously adapted to the requirements of modern technology, maintaining at its headquarters in Darmstadt a fabrication plant with its own modern factory facilities on a 65,000 square-meter site. With 200 highly-qualified, experienced employees, we offer services involving all aspects of construction projects from a single source, from project planning, structural engineering and design, right down to fabrication and assembly. The annual production capacity at the Darmstadt plant is approx. 20,000 metric tons.
The technical expertise and experience of our company is manifest in the completion of many major projects and outstanding buildings such as the curved steel structures of the Berlin Central Station, the Porsche Museum in Stuttgart, the Stuttgart exhibition center’s multi-level parking garage, the Wesel Rhine Bridge, the Schönebeck Elbe Bridge, the stadium roof of the Rhein Neckar Arena (TSG 1899 Hoffenheim), the coal-fired power plants in Wilhelmshaven, Rotterdam, as well as in Kusile and Medupi in South Africa, or the launch table and umbilical mast of the ARIANE 6 launch site in Kourou, French Guiana.