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 31
e system is a balanced one, it is as well the line of action of the resultantof all the forces upon eitlicr side of that segment. When the forces are parallel or nearly so,a special expedient is necessary to enable us to draw an equilibrium polygon. This case istreated of in Arts. 37-44. 29.… … direction by Its line of action is found 2 vert. comp. by putting its moment about A, equal to the sum ofthe moments of the given forces, or Ra = 2 mom.To cause equilibrium we must have R, or Fig. 17. moments, or 2 mom.,equilibrium: V {2 hor, comp.)* -f- {2 vert, comp.), = o, giving equilibrium of…
