Cyclopedia of architecture, carpentry, and building : a general reference work (1912)
American Technical Society · Chicago : American Technical Society · leaf 181
the arrowheads point in the same way around, from A to D. 145 12 STATICS A number of force polygons can be drawn for any system offorces, no two alike. Thus A^ B^ C^ D^ and A, B, C^ D^ are otherforce polygons for the same three forces, 80, 90, and 100 pounds.Notice that Ag Bg Cg Dg is not a force… … A force polygon is not necessarily a closed figure. If a forcepolygon closes for a system of concurrent forces, then evidentlythe resultant equals zero. EXAMPLE FOR PRACTICE. Draw to the same scale as many different force polygons asyou can for the 100-, 120- and 160-pound forces of Fig. 5. Bearin…
Architecture · Building
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