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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Dee Bridge disaster ： ウィキペディア英語版 Dee Bridge disaster The Dee Bridge disaster was a rail accident that occurred on 24 May 1847 in Chester with five fatalities. It revealed the weakness of cast iron beam bridges reinforced by wrought iron tie bars, and brought criticism to its designer, Robert Stephenson, son of George Stephenson. ==Background== A new bridge across the River Dee was needed for the Chester and Holyhead Railway, a project planned in the 1840s for the expanding British railway system. It was built using cast iron girders produced by the Horseley Ironworks, each of which was made of three large castings dovetailed together and bolted to a raised reinforcing piece. Each girder was strengthened by wrought iron bars along the length. It was finished in September 1846, and opened for local traffic after approval by the first Railway Inspector, General Charles Pasley. 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「Dee Bridge disaster」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.