Building construction and superintendence, by F.E. Kidder ... (1896)
Kidder, Frank E. (Frank Eugene), 1859-1905 · New York, W.T. Comstock · leaf 287
the line ae, and the point a, and asthe supporting force is OA, its upper end must be at a, and o will bea distance below it equal to 4,500 lbs. We then have for our stresspolygon, oa, acting up, ae, ef and fo, the point f being found bydrawing a line through o parallel to FO. In this case all of… … Fig. 293. a line parallel to CG and from f a line parallel to GF, giving thepoint g. For joint 4 the stress polygon is gc, cd, dh and hg. For joint 5 the stress polygon is of, fg, gh, hi and io. Diagram B shows what the stresses would be if the overhangingprojections were omitted. Comparing…
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