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Loadings For Railroad Bridges. An Informal Discussion at the Annual Convention, June 11th, 1903
The constantly increasing weights of rolling stock on rajlroads is a subject which affects most vitally the safety of all bridges on such roads; and, as few operating departments have made proper allowance for such increase in ordering these structures, it has been necessary to remove many good bridges and replace them with heavier ones within very short periods; generally much shorter than their natural life under loads for which they were designed. It is properly the field of the operating departments to keep the probable increase in loads in view when giving data to the construction departments; but though these live loads have been increased more than 100% in the last twenty years, with no certain signs of a maximum limit, it is seldom we find an operating manager who thinks there is the siightest necessity of designing bridges for greater loads than the latest locomotives he has ordered; and the writer has known railroads to order bridges on the same line for three different live loads within two years, so that the first bridges were overatrained 33¼% within two years after they were completed.
Loadings For Railroad Bridges. An Informal Discussion at the Annual Convention, June 11th, 1903
The constantly increasing weights of rolling stock on rajlroads is a subject which affects most vitally the safety of all bridges on such roads; and, as few operating departments have made proper allowance for such increase in ordering these structures, it has been necessary to remove many good bridges and replace them with heavier ones within very short periods; generally much shorter than their natural life under loads for which they were designed. It is properly the field of the operating departments to keep the probable increase in loads in view when giving data to the construction departments; but though these live loads have been increased more than 100% in the last twenty years, with no certain signs of a maximum limit, it is seldom we find an operating manager who thinks there is the siightest necessity of designing bridges for greater loads than the latest locomotives he has ordered; and the writer has known railroads to order bridges on the same line for three different live loads within two years, so that the first bridges were overatrained 33¼% within two years after they were completed.
Loadings For Railroad Bridges. An Informal Discussion at the Annual Convention, June 11th, 1903
Hodge, Henry W. (author) / Schaub, J. W. (author) / Swensson, Emil (author) / Cooper, Theodore (author) / Himes, A. J. (author)
Transactions of the American Society of Civil Engineers ; 51 ; 105-113
2021-01-01
91903-01-01 pages
Article (Journal)
Electronic Resource
Unknown
Engineering Index Backfile | 1903
Engineering Index Backfile | 1903