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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    Title :

    Ninety-four years of bridges at harpers ferry


    Additional title:

    Eng. Contracting


    Contributors:

    Published in:

    Publication date :

    1931


    Size :

    3 pages


    Remarks:

    3 Figs.


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English