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The Bridgeport Lamp Chimney Company Bowstring Concrete Arch Bridge is located between Mechanic Street and Baltimore and Ohio Railroad tracks in Bridgeport, West Virginia. The bridge was constructed in 1924, designed by Frank McEnteer.〔http://www.wvculture.org/shpo/nr/NRLIST02.txt〕 This elegant bowstring reinforced concrete arch bridge represents a traditional bridge type which was readily adapted to what was essentially a new construction material: reinforced concrete. Unlike a rail or road bridge, this bridge can be considered an unusual pedestrian bridge in that it was built by the Bridgeport Lamp Chimney Company in 1924 to provide access from the glass plant to a warehouse on the other side of Simpson Creek. The bridge was designed to carry hand carts with glass products across the river to the warehouse. The bridge remains the only evidence of the original works, and its successor, Master Glass Company. Thus the bridge stands in splendid isolation from any other structure. ==Structure details== The bridge is long by in width. The height of the center line transom is above the deck. Although hidden from view, a notable feature is the proprietary reinforcement used throughout the structure. The principal reinforcing bars are either of the patented Havemeyer reinforcement produced by the Concrete Steel Company of New York, or a similar bar produced by Cambria Iron Works of Johnston, Pennsylvania. It was an era of intense competition among reinforcing bar manufacturers with each individual deformed bar pattern carefully protected by patents. Smooth bars of approximately diameter were employed for stirrups throughout the bridge structure.〔http://www.wvculture.org/shpo/nr/pdf/harrison/96001571.pdf〕 *Arch: *Tension ties: *Deck: *Verticals: 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「Bridgeport Lamp Chimney Company Bowstring Concrete Arch Bridge」の詳細全文を読む スポンサード リンク
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