Inventors at work, with chapters on discovery (1906)
Iles, George, 1852-1942 · New York, Doubleday, Page & company · leaf 43
Girder cut from joist. … Rubber I-beam suspended flatwise, and edgewise. Girders of steel are rolled and riveted together at the mills ina variety of contours, each best for a specific duty, as the skeletonof a floor, a column, or a part of a bridge. Their lengths, if de- GIRDERS 11 sired, may far exceed those possible to…
Inventions · Inventors
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