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Anders Olsen Jordahl (April 4, 1878–February 18, 1969) was a Norwegian-American engineer, inventor and entrepreneur. Anders Olsen Jordahl was born at Elverum in Hedmark, Norway. His parents were Ole Jordahl and Mary (Furer) Jordahl. His father was a schoolteacher. His family was originally from the traditional district of Nordmøre. In the first years of the new century, Jordahl met the young Swedish civil engineer Ivar Kreuger in the United States. They were both interested in reinforced concrete building design and construction, and worked for a few years in the building industry in the United States. After their work together, both returned to Europe to promote their modern ideas. In 1907, Ivar Kreuger acquired the European marketing rights for ''Kahneisen'', a system for reinforced concrete construction invented by Julius Kahn during 1903. In Germany, Jordahl and Kreuger, formed the company Deutsche Kahneisen Gesellschaft mbH (now Jordahl GmbH) in 1913.〔Julius Kahn (1874–1942) civil engineer and inventor, formed Trussed Concrete Steel Company together with his brother Albert Kahn (1869–1942) in 1903.〕 〔(Jordahl Befeistungstechnik website, Jordahl history (in German). ) (Old link )〕 Through this company, Jordahl developed and patented an anchor channel for reinforced concrete buildings. He designed a C-shaped profile in 1913 which was moulded into walls and used as reinforcement and connection device at the same time. This was the first anchor channel ever developed.〔 The patent for this invention was granted to Jordahl on December 11, 1913. Kreuger had not only studied building design in America, but also the workings of the stock exchange. He returned to Sweden, and became a famous, (and later infamous) tycoon. For a short period the two friends ran a restaurant in South Africa. They continued a personal relation during following years until Kreuger's death in 1932. In 1941, Jordahl moved to Millstone, New Jersey, where he died in 1969. ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Anders Jordahl」の詳細全文を読む スポンサード リンク
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