Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics (1892)
Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 171
ixed on the foundation. The Great Steel Derrick at the Brooklyn (N. Y.) Navy-Yard is carried on a pontoon 60 ft.wide by 63 ft. long. The tower is built of steel I-beams and rods, and contains 63 tons of metal. 156 CRANES. The king post is 65 ft. high ; 14 ft. 7 in. from its base it passes through… … Km. 1.—Sellers .Mt-ntw s\viii;:iiig crane. members of tlic front boom are 16A in. I-beams, spaced far enough apart for tlie stieaves andtackle to work between. The object of the back boom is simply to aflFord a point of attach-ment with advantageous leverage for the back-stays. The upper surface of…
Mechanical engineering
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