Inventors at work, with chapters on discovery (1906)
Iles, George, 1852-1942 · New York, Doubleday, Page & company · leaf 510
concrete were used and angle columns five feetapart. The concrete of the side walls is from fifteen to eighteeninches thick. At first, properly enough, reinforced concrete was adoptedwith much caution in bridge-building. To-day hundreds ofbridges in this material are doing servicethroughout the… … Water culvert. New YorkSubway. 444 REINFORCED CONCRETE New York, has been accepted for the Memorial Bridge to crossthe Potomac River at Washington. A centre-draw span of 159 SLOPE OF GRAD£ _C_ r/W50 t BARS6C.rOC.
Inventions · Inventors
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