Cyclopedia of architecture, carpentry, and building : a general reference work . Fiff. 43. the vertical components of all the forces on the left part equal tozero, thus: Fj sin 2G 34 + 4,000 = 0;- 4,000 - 4,000 or Fi - 8,948, sin 2(1^ 34 with the first result. EXAMPLES FOR PRACTICE. 1. Determine by the method of sections the stresses in mem-bers 23, 25, and 45 of the truss represented in Fig. 26, due to theloads shown. ( Stress in 23 = - 5,000 pounds,Ans. -^ Stress in 25 = — 3,350 in 45 = + 8,000 pounds * The arm of Fi with respect to (4) is feet. 201 68 STATIC
Cyclopedia of architecture, carpentry, and building : a general reference work . Fiff. 43. the vertical components of all the forces on the left part equal tozero, thus: Fj sin 2G 34 + 4,000 = 0;- 4,000 - 4,000 or Fi - 8,948, sin 2(1^ 34 with the first result. EXAMPLES FOR PRACTICE. 1. Determine by the method of sections the stresses in mem-bers 23, 25, and 45 of the truss represented in Fig. 26, due to theloads shown. ( Stress in 23 = - 5,000 pounds,Ans. -^ Stress in 25 = — 3,350 in 45 = + 8,000 pounds * The arm of Fi with respect to (4) is feet. 201 68 STATICS 2. Determine the stresses in the members 12,15, 84, and 56of the truss represented in Fig. 27, due to the loads shown. ( Stress in 12 =- 11,170 pounds, Stress in 15 = + 10,000 pounds,I Stress in 84 = - 8,940 pounds,I Stress in 56 = + 6,000 pounds. Ans. d.(i).
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