SEH Engineering GmbH

SEH Engineering GmbH is a German steel construction and engineering company headquartered in Hanover. It is a subsidiary of Eiffage Métal SAS in France, which in turn belongs to the Eiffage Group, one of Europe's largest construction groups. The company operates from locations in Hanover, Dortmund, Ostrhauderfehn, Elbe-Parey and Fürth, delivering projects in steel construction, special structures, bridge building, reconstruction, conveyor technology, Future Tec and the Sandwich Plate System (SPS). The company's roots go back to 1808, when the iron trading house Franz Juncken was founded in Hanover. Over the 19th and 20th centuries it evolved from a local ironmonger into an internationally active steel construction firm. It was acquired by Friedrich Krupp AG in 1926 and operated under various Krupp names until the early 2000s. After a period under ThyssenKrupp and then the Certina Group, it was acquired by the French Eiffage Group and renamed Eiffel Deutschland Stahltechnologie GmbH. In 2016 it took its current name, SEH Engineering GmbH. SEH Engineering is known for complex steel structures and bridges. Its project portfolio includes the Effelsberg radio telescope (1972), the Centre Pompidou in Paris (1976), the roof structures of the Veltins-Arena in Gelsenkirchen and the AWD-Arena in Hanover, the El Ferdan Bridge over the Suez Canal (2001, the world's largest swing bridge), the Moses Mabhida Stadium in Durban (2008), the Klimahaus Bremerhaven (2008), the Hochmoselbrücke (2019) and the new Kattwyk Bridge in Hamburg (2020). The company also participates in infrastructure projects such as the Ariane 6 spaceport in Kourou. As part of the Eiffage Group, SEH Engineering combines German steel construction expertise with the resources of a major European construction group. Its activities span new build, reconstruction and surface protection, with a strong focus on engineering-intensive bridge and special structure projects.

The company's origins lie in the iron trading house Franz Juncken, founded in 1808 in the centre of Hanover. In 1860 Georg von Cölln (1837–1908) joined the business, which he led from 1877 under the name Georg von Cölln Eisenwarenhandlung. From 1880 the company grew from a local ironmonger into an internationally active enterprise executing complete plants as project work, building large steel structures of all kinds as well as field railways. In 1912 Friedrich Krupp AG acquired a stake and took over the company in 1926, continuing it under the old name until 1965. Thereafter the company was called Friedrich Krupp Eisenhandel. After the end of the Second World War in 1945, the Hanover plant was to be closed as part of reparations, but the works council succeeded in preserving the jobs. The company was renamed Krupp Eisenhandel GmbH, acquired its present site, separated from trading and expanded production in iron high-rise and bridge construction. In the 1950s the iron trade was separated from iron high-rise and bridge construction; the iron trade closed in 1977. During the years of the "Wirtschaftswunder" the company participated in the expansion and construction of numerous industrial enterprises, such as the Volkswagen works, Continental tyre works and the Hanover trade fair. After becoming independent as Krupp Stahlbau Hannover GmbH, it was assigned to the Krupp Hoesch Industries GmbH division between 1998 and 2005. Following the merger of Thyssen and Krupp it was assigned to the ThyssenKrupp Technologies division and in 2002 renamed ThyssenKrupp Stahlbau, effective April 2005. In 2006, after acquisition by the Certina Group, it was renamed back to Krupp Stahlbau Hannover, and in 2007 to KSH Stahlbau Hannover. It was then acquired by the French Eiffage Group, resulting in the name Eiffel Deutschland Stahltechnologie GmbH. In 2016 the name was changed to SEH Engineering GmbH. The company is structured alongside Stahlbau Engineering GmbH (holding) into subsidiaries: EDS Steel Solution GmbH (Hanover) for light to medium steel construction, locksmith work and profile processing; SEH Reconstruction GmbH (Hanover) as a competence centre for steel and bridge construction refurbishment; SEH Fördersysteme GmbH (Hanover & Ostrhauderfehn) for conveyor technology with in-house production of core components; and SPH Surface Protection GmbH (Hanover) for corrosion protection, blasting, airless coating and surface protection/sealing. SEH Engineering has been involved in numerous prominent projects. In steel construction these include the Effelsberg radio telescope (1972), Centre Pompidou Paris (1976), Hanover trade fair halls 8 and 9 (1998, then the world's largest cantilevered exhibition hall in Europe), VW Autostadt car towers in Wolfsburg (2000), Saale bridge Beesedau (2000), El Ferdan Bridge over the Suez Canal (2001, world's largest swing bridge), Veltins-Arena Gelsenkirchen roof (2001), German Emigration Center Bremerhaven (2005), AWD-Arena Hanover roof (2004, Engineering Prize 2006), Kiel main station roof (2006), Stuttgart trade fair halls (2007), Moses Mabhida Stadium Durban (2008), Klimahaus Bremerhaven (2008, European Steel Construction Prize 2009), Gondwanaland (2010), Mercedes-Benz Arena Stuttgart membrane roof extension (2011), Hamburg main station hall refurbishment (2011, Ulrich Finster Engineering Prize), Wiesbaden main station hall roof renewal (2013), S-Bahn station Elbbrücken gallery roof (2017 with follow-up order 2019, Steel Innovation Prize 2018), and participation in the Ariane 6 spaceport in Kourou (Portique Mobile 2017, assembly hall BL 2019). In bridge construction, projects include the Saale bridge Beesedau (2000), Svinesund Bridge Norway/Sweden (2005), Oberhafen bridge Hamburg (2006–2007), Gablenz bridge Kiel (2009), Kennedy Bridge Bonn (2010, Engineering Prize 2010), Stör bridges Itzehoe (2010 and 2015), Botlekbrug Rotterdam (2014, Special Engineering Award 2016), Kienlesberg bridge Ulm (2018, Ulrich Finster Engineering Prize 2019), Hochmoselbrücke (2019, then Europe's largest bridge project), Kattwyk bridge Hamburg (2020), and the Rhine bridge Leverkusen (first structure early 2024, second planned for 2027). Special structures and system bridges include the El Ferdan Bridge (2001), Transrapid Shanghai switches (2003), Echelsbach temporary bridge (2017), and Pont Grand Duchesse Charlotte Luxembourg conversion (2018). Reconstruction projects include the Mahatma Gandhi Bridge Hamburg (2015) and Zillertal bridge (2015).

• 2016

  Renamed SEH Engineering GmbH.

• 2007

  Renamed KSH Stahlbau Hannover.

• 2006

  Acquired by Certina Group; renamed Krupp Stahlbau Hannover.

• 2002

  Renamed ThyssenKrupp Stahlbau (effective April 2005).

• 1998

  Assignment to Krupp Hoesch Industries GmbH division.

• 1977

  Iron trade division closes.

• 1950

  Separation of iron trade from iron high-rise and bridge construction.

• 1945

  Post-war works council action saves Hanover jobs.

• 1926

  Krupp takes over the company.

• 1912

  Friedrich Krupp AG acquires a stake.

• 1880

  Expansion from local ironmonger to internationally active enterprise.

• 1877

  Company operates as Georg von Cölln Eisenwarenhandlung.

• 1860

  Georg von Cölln joins the business.

• 1808

  Franz Juncken iron trading house founded in Hanover.

Engineering-intensive steel construction and bridge specialist within the Eiffage Group.

• Steel structures

• Bridge construction

• Special structures

• Reconstruction

• Conveyor technology

• Sandwich Plate System (SPS)

• Surface protection

1. 1SEH Engineering GmbH - Wikidatawikidata.org
2. 2SEH Engineering - Wikipedia (German)de.wikipedia.org