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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 Powerscourt Covered Bridge ： ウィキペディア英語版 Powerscourt Covered Bridge The Powerscourt Covered Bridge, alternately known as the "Percy Covered Bridge" spans the Chateauguay River, between the municipalities of Elgin and Hinchinbrooke, in SouthWest Quebec.〔(1984 Report by Robert W. Passfield, HISTORIC SITES AND MONUMENTS BOARD OF CANADA )〕 == Overview == A road bridge (now open only to light automotive traffic), it was constructed in 1861, and employs the McCallum inflexible arched truss, developed by Daniel McCallum. This extremely strong wooden truss was, until then, used only in the construction of railroad bridges across North America. With the advent of steel replacing wood in railroad bridge construction in the second half of the 19th Century, all wooden railroad bridges were gradually replaced by steel ones. As it was not a railroad bridge, the Percy bridge remains to this day as an anomaly, and is the sole McCallum truss bridge left in the world. It is the oldest ''covered'' bridge in Canada. Built only a year or so after the Victoria Bridge in Montreal, the Percy bridge, unlike the Victoria, still retains its original shape, its original architecture, and indeed most of its original materials to this day. Using these criteria, it may be argued that the Percy bridge is the oldest bridge in Canada, covered or otherwise. 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「Powerscourt Covered Bridge」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.