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 29
Fig. 13. force polygon also, for since 5(9 is equal and parallel to R, the resultant of the systemP^...P^, R is zero, and therefore we have equilibrium of translation. Equilibrium ofrotation is not in question, the forces being concurrent. Expressed graphically, the onlycondition necessary for…
