WORLD FOR CIVIL

Statics & Strength of Materials

Problem Assignment - Trusses 2

Note the typical designation of pin and roller supports in the diagrams shown.

1. Calculate the forces in all members of the truss shown in the following diagram using the method of joints. [AB =10,600 lb (C), CB = 10,600 lb (C)]

2. Calculate the forces in all member of the truss shown in the following diagram using the method of joints. [Ay = 6,540 lb., Ax = -10,000 lb, Cy = 8460 lb., AB = 8,375 lb, AC = 15,230 lb, BC=17,420 lb)

3. Calculate the forces in all members of the truss shown in the following diagram using the method of joints. (Ay = 225 lb, Ax = -500 lb., Cy = 475 lb., AB = 450 lb., AD = 890 lb., BC = 950 lb.)

4. Calculate the forces in all members of the truss shown in the following diagram using the method of joints. [Ay=Ey=40,000 lb., AB =56,580 lb. (C), AF = FG = 40,000 lb. (T), BF=0, BC = CD =65,000 lb (T), BG = 35,360 (T), CG = 50,000 lb, right side same by symmetry]

5. Calculate the forces in all members of the trusses shown in the following
diagram using the method of joints. [Ey =90,000 lb., Fy=-20,000 lb., Fx=40,000 lb., AB = 0, AC = 35,000 lb. (C), BC = 21,220 lb. (C), BD=20,000 lb. (C), CD = 25,000 lb. (C), DF = 20,000 lb. (C), CE = 90,000 lb. (C), EF = 0, CF = 56,580 lb.(T)]

6. Calculate the forces in members BC, BG, and FG, by method of joints, for the cantilever truss shown below. [Ax=-26,250 lb., Ay=15,000 lb., Ex=26,250 lb., BC = 8,750 lb. (T), BG=17,366 lb. (T), FG=17,500 lb (C)]