The theory and practice of modern framed structures : designed for the use of schools, and for engineers in professional practice (1897)
Johnson, J. B. (John Butler), 1850-1902, Bryan, C. W. (Charles Walter), 1863-1927, Turneaure, Frederick Eugene, 1886- · New York : J. Wiley & Sons · leaf 30
s must each sum up zero, so here, our force polygon must close, or2 hor. comp. = o and 2 vert. comp. = o. And further, as we can supply two unknown quan-tities in the former case, so here, having a system in equilibrium, we can, either graphically orby the use of the above equations, compute two… … Fig. 15. 28. Graphically.—Let /,.../,, Fig. 15, be a system ofnon-concurrent forces. Required their resultant and condi-tions of equilibrium. We can combine with P,, getting their resultant R,, thenthis resultant with Pg, gettingand finallywith , gettingR,, the resultant of the entire system in…
