Evolution from covered timber "arches" of 1836 to Bollman iron trusses and on to modern steel structures; Potomac River crossing of Baltimore and Ohio Railroad has made bridge history as well as reflected changes in railroad rolling stock and operating practices. (See also Eng. News-Rec vol. 107, no. 12, Sept. 17, 1931 pp. 446-448, 3 figs)


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    Titel :

    Ninety-four years of bridges at harpers ferry


    Weitere Titelangaben:

    Eng. Contracting


    Beteiligte:

    Erschienen in:

    Erscheinungsdatum :

    1931


    Format / Umfang :

    3 pages


    Anmerkungen:

    3 Figs.


    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch


    Schlagwörter :


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