Kirkman, Marshall Monroe, 1842-1921 · New York, Chicago, The World Railway Publishing Company · leaf 301
MAINTENANCE OF TRACK. 297 this country there are notable instances of such constructions. In this country the wooden bridge has been an important — in fact, an essential — element in the successful … away. The result is what is called an I beam. When greater loads have to be carried, the I beam is enlarged and built up of metal plates riveted together, and thus becomes a plate girder. These are used for all short rail- way spans. For greater spans the truss must be employed. . . . Except under…
Railroads · Transportation
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
