Dyckerhoff & Widmann
Corporate brand
UnclaimedDyckerhoff & Widmann was a German construction company whose engineering innovations helped establish modern concrete, shell construction, and prestressed-concrete practice.
Last updated August 24, 2026
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Overview
Dyckerhoff & Widmann, commonly known as Dywidag, was a German construction and civil-engineering company founded in Karlsruhe in 1865. Its origins lay in Lang & Co., an enterprise established by cement pioneer Wilhelm Gustav Dyckerhoff. The business initially concentrated on manufacturing concrete components, but it developed into a major contractor and engineering organization as concrete construction expanded in Germany during the late nineteenth and twentieth centuries. Wilhelm Gustav Dyckerhoff's son Eugen Dyckerhoff joined the company in 1866. Eugen and his father-in-law Gottlieb Widmann subsequently reshaped the enterprise and gave it the name Dyckerhoff & Widmann. Under their direction, the company moved beyond component production into construction engineering and large-scale building work. The firm became associated with technically ambitious concrete structures, including the Centennial Hall, or Jahrhunderthalle, in Wrocław, a landmark project in the history of reinforced-concrete architecture. The company's importance rested not only on the size of its projects but also on its construction methods. Eugen Dyckerhoff developed Stampfbeton, a form of compressed or rammed concrete that became an important nineteenth-century technique in Germany. In the late 1920s, Dyckerhoff & Widmann developed the Zeiss-Dywidag system, a shell-construction method that enabled large roof spans with comparatively thin concrete shells. The system received an Edward Longstreth Medal of Merit from the Franklin Institute in 1938. Through the middle decades of the twentieth century, the company built many shell structures and contributed to the development and practical adoption of prestressed concrete and the cantilever method in Germany. The company changed its geographic base as it grew. Its headquarters moved from Karlsruhe to Wiesbaden in 1907, and after the Second World War the main base was moved to Munich. Dyckerhoff & Widmann expanded through corporate acquisitions as well as organic engineering work. It took over Siemens-Bauunion in 1972 and Union-Bau AG in 1991, strengthening its position in the German construction market. The company's twentieth-century history also includes its involvement in the Nazi forced-labor system. During the Second World War, Dyckerhoff & Widmann used prisoners from Camp No. 36 at the Blechhammer labor subcamp associated with Auschwitz III. Many prisoners from this system died during the evacuation and death marches in 1945. This history is an essential part of any account of the company and distinguishes its technical achievements from the ethical and human consequences connected with its wartime operations. In 2001, Dyckerhoff & Widmann became part of Walter Bau AG, another major German building contractor. Walter Bau's insolvency in 2005 ended the company's independent corporate existence. Its operations and assets were divided, with the largest portion taken over by the Austrian construction group Strabag. Dyckerhoff & Widmann therefore survives primarily as a historical name associated with German construction engineering, concrete innovation, and major infrastructure and building projects rather than as an active standalone brand.
History
Dyckerhoff & Widmann began in 1865 as Lang & Co. in Karlsruhe, founded by Wilhelm Gustav Dyckerhoff, a German pioneer of cement production. The original business focused primarily on concrete components. In 1866, Wilhelm's son Eugen Dyckerhoff joined the enterprise. Eugen and his father-in-law Gottlieb Widmann later reorganized the business under the name Dyckerhoff & Widmann, creating a company that combined materials knowledge with construction expertise. During the late nineteenth century, the company expanded into construction engineering and became one of Germany's leading concrete contractors. Its work included large and technically prominent structures, among them the Centennial Hall in Wrocław. The company also pursued improvements in concrete technology. Eugen Dyckerhoff developed Stampfbeton, a compressed-concrete technique that became a standard method in German concrete construction during the nineteenth century. In 1907, the company moved its headquarters to Wiesbaden. Its engineering activities broadened during the twentieth century, particularly in reinforced concrete, shell construction, prestressed concrete, and bridge and building construction. At the end of the 1920s, Dyckerhoff & Widmann developed the Zeiss-Dywidag system for concrete shell structures. The system made it possible to construct thin, large-span shells and helped establish the company as an important specialist in modern concrete architecture. The Franklin Institute recognized the system with an Edward Longstreth Medal of Merit in 1938. Dyckerhoff & Widmann continued to construct substantial numbers of shell buildings into the 1960s and played an important role in bringing prestressed concrete and the cantilever method into German practice. The company's wartime history is inseparable from the forced-labor system of Nazi Germany. During the Second World War, Dyckerhoff & Widmann used prisoners from Camp No. 36 at Blechhammer, a labor subcamp connected with Auschwitz III. Many of the prisoners subjected to this system died in 1945 during evacuations, death marches, and subsequent imprisonment. The company's technical record must therefore be considered alongside its documented participation in wartime exploitation. After the war, the headquarters ultimately moved to Munich. The company expanded through acquisitions, taking over Siemens-Bauunion in 1972 and Union-Bau AG in 1991. These transactions increased its scale and broadened its construction and engineering capabilities. In 2001, Dyckerhoff & Widmann became part of Walter Bau AG. When Walter Bau became insolvent in 2005, the former Dyckerhoff & Widmann organization was divided. The largest portion of its business was acquired by Strabag, the Austrian construction group. The independent company consequently ceased to operate, while its engineering legacy and historical project record remained part of the history of German construction.
- 2005
Breakup after Walter Bau insolvency
[1]Walter Bau's insolvency resulted in the division of the former Dyckerhoff & Widmann business, with the largest part going to Strabag.
- 2001
Integration into Walter Bau
[1]Dyckerhoff & Widmann became part of Walter Bau AG.
- 1991
Acquisition of Union-Bau AG
[1]The company acquired Union-Bau AG, further enlarging its German construction operations.
- 1972
Acquisition of Siemens-Bauunion
[1]Dyckerhoff & Widmann took over Siemens-Bauunion as part of its expansion in the construction sector.
- 1938
Franklin Institute recognition
[1]The Zeiss-Dywidag shell-construction system received an Edward Longstreth Medal of Merit.
- 1930
Development of the Zeiss-Dywidag system
[1]The company developed its Zeiss-Dywidag system for thin concrete shell construction in the late 1920s.
- 1907
Headquarters move to Wiesbaden
[1]The company transferred its headquarters from Karlsruhe to Wiesbaden as its operations expanded.
- 1866
Eugen Dyckerhoff joins the business
[1]Wilhelm Gustav Dyckerhoff's son Eugen entered the company and later helped establish the Dyckerhoff & Widmann identity.
- 1865
Company founded as Lang & Co.
[1]Wilhelm Gustav Dyckerhoff founded Lang & Co. in Karlsruhe, initially focusing on concrete components.
Products and positioning
A technically innovative German construction and engineering contractor specializing in concrete structures, large-span shell construction, prestressed concrete, and complex building projects.
Concrete construction materials · 1865
Concrete components
The company's original activity was the production of concrete components. This manufacturing base provided the material and technical foundation for its later expansion into construction engineering and large building projects.
Compressed concrete construction
Stampfbeton
Stampfbeton was a compressed or rammed-concrete technique associated with Eugen Dyckerhoff. It became an important nineteenth-century method in German concrete construction and reflected the company's early role in developing practical concrete technologies.
Concrete shell construction
Zeiss-Dywidag system
Developed in the late 1920s, the Zeiss-Dywidag system was a shell-construction method for creating large-span roofs and other structures from relatively thin concrete shells. It became one of the company's best-known engineering innovations and was used extensively through the middle decades of the twentieth century.
Structural engineering
Prestressed-concrete construction
Dyckerhoff & Widmann contributed to the establishment and practical use of prestressed concrete in Germany. This work formed part of the company's broader structural-engineering business, which included major buildings and civil-engineering projects.
Civil engineering
Cantilever construction
The company played an important role in introducing the cantilever method in Germany. The method allowed construction of certain large structural spans and complex concrete works without relying on conventional full-support arrangements during construction.
Controversies
Use of forced labor at Blechhammer during the Second World War
Historical accounts state that Dyckerhoff & Widmann used prisoners from Camp No. 36 at the Blechhammer labor subcamp associated with Auschwitz III. Most of those prisoners died in 1945 during death marches or subsequent imprisonment. This is a documented wartime human-rights abuse connected with the company's operations.
Brand decisions
2005
Disposition of the business after Walter Bau insolvencyOtherBackground
Walter Bau AG became insolvent, placing the former Dyckerhoff & Widmann operations within a broader restructuring and asset-disposal process.
Action taken
The former company was split up, and the largest part of its business was taken over by Strabag.
Aftermath
Dyckerhoff & Widmann ceased to exist as an independent operating company.
2001
Join Walter Bau AGM&ABackground
Dyckerhoff & Widmann was operating in a consolidating German construction market and became part of Walter Bau AG.
Action taken
The company was integrated into Walter Bau, ending its independent corporate status.
Aftermath
Walter Bau's later insolvency led to the division of the former Dyckerhoff & Widmann business, with the largest part acquired by Strabag in 2005.
Sources2 sources
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