DYWIDAG Systems International

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DYWIDAG-Systems International (DSI) is a globally operating technology group that has its focus on the construction and underground markets. In 2010, the company had 2,118 employees. DSI's activities in Construction and Underground are currently focused on the regions EMEA (Europe, Middle East, Africa), North America, South America and Asia/Pacific.


Dyckerhoff & Widmann AG (Dywidag) was founded in 1865 as a bridge construction company. They developed a threaded rebar system as a way to easily post-tension components in the construction of segmental bridges. This method was a great success so they continued using the technique and began selling the threadbare to other construction companies. The sales of the bar and accessories eventually trumped the revenue from the bridge construction side of the business so the company transitioned to the manufacturing and supplying of products for construction rather than being involved in bridge construction itself. DSI was founded in 1979 as a Dyckerhoff & Widmann AG subsidiary to market licences for DYWIDAG-products and systems around the world. At the beginning, DSI's focus was on construction, with a principal market focus being post-tensioning concrete and geotechnics. In 2000, DSI began to establish a second division in the underground sector. The main focus of this division is the development, production and supply of products and systems for mining and tunneling.

Products and services[edit]

All of the company's activities in "concrete accessories", which form part of the construction business, are combined in DSI's traditional DYWIDAG form tie business with products and systems produced by the DSI companies in Porta Westfalica, contec-systems (Germany), as well as in the companies Artéon, Mandelli-Setra, Technique Béton and Idéaplast (all of them located in France).

The group's underground activities in EMEA are concentrated at DSI GmbH in Pasching/Linz, Austria (formerly ALWAG GmbH). At the same time, DSI Austria is the center of competence for the development and application of mining and tunnelling systems.

DSI's business in the South American region was newly structured at the beginning of 2009. DSI Chile Industrial Ltda. (Santiago, Chile), Protendidos DYWIDAG Ltd. (São Paulo, Brazil), and DSI-Fosminas (Belo Horizonte, Brazil) were combined with DSI Peru (Lima, Peru) to form a division acting on the South American market.

DSI's worldwide presence is based on a decentralized corporate structure. DSI is globally represented by its own DSI companies, licensees and agents.


Dyckerhoff & Widmann (Dywidag) was founded in 1865. In 1950 DYWIDAG starts its licence business, while in 1979 DSI, initiated international operations. DSI further strengthened its supply business, for the mining industry, in 2000. In 2001, DSI and DYWIDAG become part of the Walter Bau Group and in 2005 DSI was purchased by Industri Kapital after Walter Bau's insolvency. After the sale in 2006, the company began concentrating on new business divisions that included tunneling and concrete accessories. During 2007, DSI network comprised more than 90 subsidiaries, joint ventures, licensees and agents and it was sold to CVC Capital Partners. 2009 saw the merger of DYWIDAG-Systems International GmbH,Germany with subsidiaries including SUSPA-DSI and contec. Later merger of ALWAG Tunnelausbau Ges.m.b.H. into DYWIDAG-Systems International Ges.m.b.H., Austria was also completed. During 2010, DSI was acquired by DSI by BAML (Bank of America Merrill Lynch) and Barclays Capital. Subsequently, in 2011, DSI was sold to Triton Private Equity.


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