Review of progress in methods of placing steel spans; gin poles, gallows frames, and hand tackle superseded by locomotive cranes, up to 100 tons in capacity, by steel movable derricks, and booms up to 80 ft in length; girder-erection methods; launching of span with cableway; erection with traveling towers, and on intermediate crib pier; girders erected by transverse displacement. (See also Gen Contractors Assn -- Bul v 23 n 9 Sept 1932 p 197-203)
Development of erection of girder bridges
Civ Eng (NY)
Civil Engineering (New York) ; 23 , n 6
1932
6 pages
Article (Journal)
English
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