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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 Perkiomen Bridge ： ウィキペディア英語版 Perkiomen Bridge The Perkiomen Bridge, originally built 1798-99 and widened in 1928, is one of the oldest stone arch bridges in the United States still in use. It crosses Perkiomen Creek near Collegeville, Pennsylvania. The bridge's six semi-circular arches cover a total of over . The longest arch spans . Its decorative piers and belts courses are unusual for a bridge this old. A lottery financed $20,000 of the original construction. The bridge carried the main road from Philadelphia to Reading, known at various times as the Manatawny Pike, Germantown Pike, the Philadelphia-Reading Pike, and US 422. Since the construction of the US 422 bypass, the road has been known as Ridge Pike or Old US 422.〔(PHMC Historical Markers ) Searchable database, search keyword "Perkiomen Bridge"〕〔Thomas, 1984, Item 8, pp. 1-2.〕〔Historical American Buildings Survey (HABS), data pages 1-5.〕〔PennDOT〕 ==Architecture== The creek is about wide and runs north and south near Collegeville. The road, however, runs northwest to southeast and the bridge crosses perpendicular to the creek causing a sharp turn in the road on the east side of the bridge, and a more gradual bend on the west side. As designed by John Lewis the bridge was wide and long including the approaches. Five arches cross the creek with the center arch long, and the arches next to it long. The outside arches are long. Supporting the eastern approach is a sixth arch, long, which is about east of the creek. The bridge is constructed of cut stones, but they are only laid in regular courses on the spandrels and on the top of the parapet. The bridge was widened in 1928 by removing all the stone facing on the north side of the bridge, extending the arches north with concrete rather than stone, and resetting the facing. This expansion added a third lane of traffic and a sidewalk on the north side. Rounded columns supporting pedestrian viewing bays were added on the north side of the piers. Shorter angular columns were added on the south side of the bridge.〔HABS〕 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「Perkiomen 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.