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Group - History


DSI acquires Schaum-Chemie Mikołów Sp. z o.o.

February 2014

DSI acquires Schaum-Chemie Mikołów Sp. z o.o. The company acts as DSI Schaum Chemie on the market.

August 2014

  • Acquisition of 100% of JENNMAR Canada strengthens DSI’s mining capabilities in Canada
  • Acquisition of 49% in J-LOK® Resins allows DSI to have own manufacturing of resin capsules in Australia
  • Establishment of a bolt and resin joint venture with JENNMAR in South Africa
DYWIDAG-Systems International (DSI) acquires Post-Tensioning business in Brazil

November 2014

DYWIDAG-Systems International (DSI) acquires Post-Tensioning business in Brazil

  • Acquisition of 100% of shares of Prepron Group
  • Establishment of a strong presence in the Brazilian Post-Tensioning market
    PT DSI Underground Indonesia opens new Manufacturing Facility for Mining Products in Indonesia

    December 2014

    PT DSI Underground Indonesia opens new Manufacturing Facility for Mining Products in Indonesia

    The new, 3,000m² manufacturing facility in Gresik, Surabaya, East Java primarily produces friction bolts for mining. 


    DSI History 2013: Foundation of DSI Techno in Russia

    April 2013

    DSI enters Russian Mining market: Foundation of the new entity “DSI Techno” in Kemerovo, Kuzbass region.
    Strategic investment in line with DSI’s growth strategy for the Mining segment

    May 2013

    DSI opens a new International Purchasing Office in Shanghai, China.
    The new office coordinates the co-operation with DSI’s Far East suppliers and all internal procurement divisions

    DSI History 2013: DSI receives five PTI awards

    May 2013

    DSI receives five awards of the Post-Tensioning Institute (PTI) in Arizona, USA
    Five major projects that DSI significantly contributed to receive
    3 “Awards of Merit“, 1 “Project of the Year Award“ and 1 „Award of Excellence“


    DSI History 2012: DSI acquires a majority stake in specialist mining contractor Drill Tek Injection Systems Ltd.

    February 2012

    DSI acquires a majority stake in UK specialist mining contractor Drill Tek Injection Systems Ltd.
    Drill Tek is a mining services contractor offering both contracting services such as roof bolt installation and resin injection as well as product supply for roof support and reinforcement in underground mines. Additionally, the UK based company provides specialist services for tunneling and civil infrastructure construction. The acquisition represents a strategic investment for the future of DSI’s business and is the first acquisition undertaken since Triton Partners acquired DSI in June 2011.

    DSI History 2012: The Harbor Drive Pedestrian Bridge, San Diego, CA - USA

    The Harbor Drive Pedestrian Bridge, San Diego, CA, USA

    March 2012

    DSI supplied DYWIDAG-Post-Tensioning Systems for one of the world’s longest Self-Anchored Pedestrian Suspension Bridges
    This project won the Engineering News Record (ENR) “Best of the Best” award.

    June 2012

    DSI acquires the rights of the JFP 95 Dust Suppressant for Reducing Dust Concentration in Mining
    The JFP 95 Blue Anti-Static Dust Suppressant marks DSI’s continuing expansion into chemical products for the Underground industry. DSI plans to use the existing distribution network that was established by WB Mining along with its own global sales network to market and sell the JFP product line worldwide.


    DSI History 2011: DSI South Africa strengthens Export Activities in Botswana and Zimbabwe

    2011, DSI South Africa strengthens Export Activities in Botswana and Zimbabwe

    DSI is one of the largest and leading producers of products and systems for mining in South Africa. DSI plans to strategically expand its export activities into the important neighboring countries such as Botswana and Zimbabwe. Clients include BHB Billiton, Xstrata, Exxaro, De Beers, Anglo American Thermal Coal, Anglo American Platinum, Bombela Construction, Sasol, CMI Joint Venture and a large number of small and medium sized mining operations

    June 2011

    The acquisition of DYWIDAG-Systems International (DSI) by Triton is closed on June, 15th, 2011. Triton, a highly respected European private equity house, is now the owner of DSI


    DSI History 2010: Significant investments in EMEA's production capabilities


    Significant investments in EMEA's production capabilities in Austria for Geotechnics, Tunneling & Mining

    March 2010

    DSI acquires the remaining 38% of shares of PROTENDIDOS DYWIDAG Ltda., Brazil



    Extension of DSI's market presence in South America by acquisitions

    February 2009

    DYWIDAG-Systems International (DSI) acquires business from AGRHIMERC S.A.C., Peru and establishes DSI Peru S.A.C.

    DSI History 2009: DSI acquires the remainder of the shares of DYWIDAG Sistemas Constructivos (DSC) in Spain

    December 2009

    DSI acquires the remainder of the shares of DYWIDAG Sistemas Constructivos (DSC) in Spain. DSC is now a wholly-owned subsidiary of the DSI Group


    DSI History 2008: DSI supplies special products for Australia's longest road tunnel in Brisbane - Australia

    2008, DSI supplies special products for Australia's longest road tunnel in Brisbane, Australia

    For the construction of the 5,000m long double tunnel, DSI supplies the AT-76 injection system used for the first time in Australia in addition to many other products and systems. The injection system protects the TBM in advance from water damage and ensuing failure

    January 2008

    The acquisition of MET-TECH Industries Ltd., USA extends DSI's market leadership in the supply of mining products in North America

    DSI History 2008: DSI acquires Fosminas Ancoragens Ltda.

    December 2008

    DSI acquires Fosminas Ancoragens Ltda., a leading producer of mining products in Brazil


    January 2007

    DSI expands its mining activities in South America by acquiring Soprofint SA, headquartered in Santiago, Chile

    January 2007

    DSI acquires 100% of the shares of the German contec Bausysteme GmbH.
    Headquartered in Porta Westfalica, Germany, contec is a leading specialist supplier of formwork and sealing systems
    on the domestic market

    DSI History 2007: Customized Products for Wastewater Treatment Plant, Marseille - France

    2007, Customized Products for Wastewater Treatment Plant, Marseille, France

    Technique Béton, a 100% subsidiary of DSI, produces and supplies its special repair mortar Ravalchoc, mould release agents and other Concrete Accessories to one of the largest sewage plants in France

    June 2007

    DSI acquires all outstanding shares of the Italian company DYWIT SPA, Milan, Italy

    July 2007

    DSI is sold by Industri Kapital to CVC Capital Partners. CVC Capital Partners is a leading international private equity company with a total of 11.6 billion Euros in equity capital

    DSI History 2007: DSI acquires Idéaplast in France

    September 2007

    DSI acquires Idéaplast in France. Idéaplast produces accessories for the construction, aviation and automotive industries


    March 2006

    DSI acquires the leading supplier of mining products Mexicana de Anclas Mineras in Zapopan, Jalisco, Mexico

    May 2006

    DSI acquires Galaxy SA with its subsidiaries Technique Béton SAS and Mandelli-Sétra SAS. The Galaxy Group is a leading manufacturer and distributor of formwork accessories, special mortars, lifting and fastening tools in construction industry.

    September 2006

    DSI strengthens its tunneling division by acquiring ALWAG Tunnelausbau Ges.m.b.H. in Pasching, Austria

    DSI History 2006: DYWIDAG Multistrand Anchors tie down Gilboa Dam, NY - USA

    2006, DYWIDAG Multistrand Anchors tie down Gilboa Dam, NY, USA

    For strenghtening Gilboa Dam, DSI produces and supplies 83 DYWIDAG Multistrand Anchors in lengths of 50-70m. The stressing operation is carried out using a 15,000kN stressing jack that was specially developed by DSI

    DSI History 2006: Woodrow Wilson Bridge, Washington D.C. - USA

    Woodrow Wilson Bridge, Washington D.C., USA

    The bridge consists of two parallel, 1,850m long bridges in each direction. Each bridge accommodates 6 lanes of traffic plus shoulders. DSI supplies the post-tensioning material and related equipment in compliance with the strict quality requirements for three independent contracts

    October 2006

    DSI further strengthens its tunneling and mining activities in North America by acquiring the shares of American Commercial Incorporated (ACI), Bristol, VA, USA

    December 2006

    DSI USA acquires Fasloc, Inc., a premier producer of Resin Cartridges for mining and tunneling in the USA


    DSI Historty 2005: Golden Gate Bridge, CA - USA

    2005 - Golden Gate Bridge, CA, USA

    Retrofit using DYWIDAG Geotechnical & Post Tensioning systems. Supply, installation, stressing and grouting of DYWIDAG Post-Tensioning Tendons.


    DSI acquires Underground companies in North America

    February 2005

    DSI acquires Stewart Mining in Canada. This acquisition establishes DSI as the market leader for mining products in Canada

    July 2005

    The European private equity firm Industry Kapital acquires DSI

    September 2005

    DSI acquires Artéon SA in France. This step strengthens DSI's market position in France and its market leadership for geotechnical and form tie systems in Europe


    DSI History 2004: "Snøhvit" project, Melkøya - Norway

    2004, "Snøhvit" project, Melkøya, Norway

    "Snøhvit" is the "northernmost industrial plant in the world". DSI supplies 1,650t of cryogenic DYWIDAG Multistrand Tendons for the construction of four LNG (Liquefied Natural Gas) Tanks


    DSI strengthens its mining business by acquiring Celtite Pty Ltd (Celtite), Australia



    DSI's global network consists of more than 75 subsidiaries, licensees and agents


    DSI History 2002: Stay Cable Bridge over the Paraná River - Argentina

    2002, Stay Cable Bridge over the Paraná River, Argentina

    Production, supply and installation of 128 DYNA® Grip Stay Cables with a total weight of 740t


    DSI opens new facility for mining products in Salt Lake City / USA and in Johannesburg / South Africa


    Integration of SUSPA GmbH activities into the German business of the DSI Group. Merger creates SUSPA-DSI GmbH


    DSI History 2000: DSI tunneling products secure various tunnels for ICE high speed railway - Germany

    2000, DSI tunneling products secure various tunnels for ICE high speed railway, Germany


    DSI acquires ANI Strata Products and establishes a new business in the underground mining industry as well as in Australia


    1999, DSI network

    More than 50 subsidiaries, licensees and agents


    1998, Merger of all German subsidiaries

    Plus Austrian and French affiliates into a single DSI GmbH with European branches


    DSI History 1997: GEWI® Piles secure Berlin's largest underground project against uplift - Lehrter Bahnhof, Germany

    1997, GEWI® Piles secure Berlin's largest underground project against uplift - Lehrter Bahnhof, Germany

    6,500 GEWI® Piles, 63.5mm Ø, were driven 17.5m to 26.4m deep into the ground from floating platforms to counteract hydraulic uplift

    DSI History 1997: Offshore oil platform Hibernia, Newfoundland - Canada

    1997, Offshore oil platform Hibernia, Newfoundland, Canada

    Production, supply and installation of 7,000t DYWIDAG Strand Tendons for the oil platform, height 111m


    1995-1997, Extension of DSI's global network.

    New DSI companies in Portugal and Indonesia. New DSI representatives in Lebanon, Czech Republic, Latin America, Croatia, Bosnia, Herzegovina and Malaysia



    DSI committed to total quality;
    DIN EN ISO 9001 since 1994


    DSI History 1988: Olympic Bridge, Seoul - Korea

    1988, Olympic Bridge, Seoul, Korea

    Development, production, supply and installation of DYWIDAG Stay Cable Systems


    1983-1992, Foundation of DSI companies and agencies

    DSI companies founded in the Netherlands, South Africa, UK, Korea, Taiwan, Thailand, Venezuela and France. DSI agencies founded in Turkey, Iran, Saudi Arabia, United Arab Emirates, Qatar and Oman


    1979, Founding of additional DSI companies in Belgium, Hong Kong, Egypt and Brazil.

    DYWIDAG establishes the DSI Company Group as an independent organization in order to take over the work of the Licensee Department and continue the successful worldwide marketing of DYWIDAG systems and technical know-how


    DSI History 1975: Construction of the CN Tower, Toronto - Canada

    1975, Construction of the CN Tower, Toronto, Canada

    550m high television tower, platform with restaurant, upper tower shaft made of prestressed DYWIDAG concrete


    DSI History 1972: BMW office building in Munich - Germany

    1972, BMW office building in Munich, Germany

    100m high cylinders that are suspended on a support tower with a useable surface of 72.000m2. Construction of the stories on the ground and subsequent lifting into their final position using the DYWIDAG Bar Post-Tensioning System

    1972, Pine Valley Bridge

    First US Application of Segmental Form Traveler Construction in San Diego, California, USA

    1972, Merger of Dyckerhoff & Widmann AG with Siemens Bauunion

    Intensified activities as a general contractor in turnkey construction, structural design, industrial construction, and underground projects as well as production of precast segments.


    1971-1973, Knight Street Bridge

    First Canadian Application of Segmental Form Traveler Construction in Vancouver, Canada


    1970-1972, First important application of DYWIDAG Bar Stay Cables

    Second Main Bridge (135 + 135m spans), Frankfurt, Germany. First significant application of DYWIDAG rock anchors with double corrosion protection in Waldeck II cavern near Kassel, Germany.
    First tests are carried out on GEWI® Piles for subsequent distribution. Development of the DYWIDAG Strand Post-Tensioning System

    DSI History 1970: Water tower Riyadh - Saudi Arabi

    1970, Water tower Riyadh, Saudi Arabia

    Main reservoir: 12.000m3; hydraulic lifting by 44m into the final position


    1969-1970, Creation of a Research & Development Department within DYWIDAG

    Systematic development of additional DYWIDAG systems such as bar, ground and rock anchors using 16mm Ø threabars and stay cable systems.
    DYWIDAG subsidiaries are founded in Austria, USA, Canada and Italy.
    Creation of an international network of companies for the global distribution of DYWIDAG systems and know-how


    1967, Marketing of the DYWIDAG Post-Tensioning System

    The decision is made to market the DYWIDAG Post-Tensioning System outside the group. The License Department is founded within DYWIDAG


    Until 1965

    DYWIDAG's Post-Tensioning System is exclusively used for DYWIDAG's own projects or partner projects


    DSI History 1964: Bendorf Bridge

    1964, Bendorf Bridge

    A new world record in prestressed concrete, Germany, Length: 524,70m


    1958, Sumitomo Electric Industries, Ltd.

    Sumitomo obtains a license for manufacturing and distributing DYWIDAG's Post-Tensioning System and for applying DYWIDAG's Free Cantilever Construction Method in Japan and the Far East


    1955-1957 Bridge Construction Projects

    Several post-tensioned prestressed concrete bridges are built in Austria, Sweden, Denmark, Finland, Norway and the Netherlands


    DSI History 1953: First prestressed concrete bridge over the Rhine river

    1953, First prestressed concrete bridge over the Rhine river:

    Nibelungen Bridge, maximum span: 114m, Worms, Germany


    1950-1955, Rapid growth of DYWIDAG's international activities

    Thanks to the growing worldwide recognition of DYWIDAG systems and construction projects


    DYWIDAG begins licensee business.


    1938, technical achievements of Dyckerhoff & Widmann AG

    Longstreth Medal in Philadelphia, USA for the world’s greatest technical achievement


    DSI History 1927: Construction of Saale bridge Alsleben

    1927, Construction of Saale bridge Alsleben

    Special feature: prestressed iron tie by Dipl. Ing. Franz Dischinger, a predecessor of today’s prestressing technique

    DSI History 1927: Construction of Saale bridge Alsleben


    DSI History 1925-1927: Construction of planetaria in Germany

    1925-1927, Construction of planetaria,

    Zeiss-DYWIDAG system, in Mannheim, Nuremberg, Dresden, and Berlin, Germany


    DSI History 1923: Dipl. Ing. Ulrich Finsterwalder

    1923, Dipl. Ing. Ulrich Finsterwalder

    joins Dyckerhoff & Widmann AG


    DSI History 1913: Dipl. Ing. Franz Dischinger

    1913, Dipl. Ing. Franz Dischinger

    joins Dyckerhoff & Widmann AG


    DSI History 1904: Railway Bridges near Kempten, Germany

    1904, Railway Bridges near Kempten, Germany

    Rammed concrete, longest span: 64,5m (212ft.)


    1902, First international activities.


    DSI History 1882: Water Reservoir - Wiesbaden, Germany

    1882, Water Reservoir, Wiesbaden, Germany

    Rammed concrete, capacity: 4.300m3 (5,600 cu. Yds.)


    DSI History 1869: Gottlieb Widmann & Eugen Dyckerhoff

    1869, Gottlieb Widmann (left) & Eugen Dyckerhoff (right)

    Change of name to Dyckerhoff & Widmann AG


    DSI History 1865: Formation of the company Lang & Cie - Karlsruhe, Germany

    1865, Formation of the company Lang & Cie, Karlsruhe, Germany


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