Machinists' and draftsmen's handbook, containing tables, rules and formulas, with numerous examples explaining the principles of mathematics and mechanics as applied to the mechanical trades; intended as a reference book for all interested in mechanical work (1910)
Lobben, Peder, 1858- · New York, D. Van Nostrand company · leaf 343
324 CRANES AND DERRICKS. CRANES. Cranes and derricks aremachines used for raising andlowering heavy weights. Inits simplest form, a crane con-sists of three principal mem-bers: The upright post, thehorizontal jib and the diagonalbrace. (See Fig. 5). Theweight P will produce tensilestress in the… … Stress in the upper bearing PX /i When the post is held at both ends, as in Fig. 5, it may.with regard to transverse strength, be considered as a beam oflength z, fastened at one end and loaded at the other with a load equal to the force h X P The compression on the post caused by the load is equal…
Mechanical engineering
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