WORLD FOR CIVIL

Statics & Strength of Materials

Problem Assignment - Trusses 1

1. The structure shown is a truss composed of axial members pinned together at the joints. The stucture is pinned to the floor at points A and F. Determine the external force support reactions, and the force in member BE by method of joints.


(Ay = -9,000 lb, Fx = - 10,000 lb, Fy = 9,000 lb
BE = 10,000 lb (T))

2. The structure shown is a truss composed of axial members pinned together at the joints. The stucture is pinned to the floor at point A and supported by a roller at point D. Determine the external force support reactions, and the force in member CD by method of joints.


(Ax = -4000 lb, Ay = 200 lb, Dy = 4800 lb
CD = 970 lb (C))

3. The structure shown is a truss composed of axial members pinned together at the joints. The stucture is supported by a roller at point A and pinned to the floor at point G. Determine the external force support reactions, and the force in members DE, DH and IH by method of sections

(Ay = 35,000 lb, Gy = 35,000 lb, DE = 25,000 lb (C), DH = 14,140 (C), IH = 35,000 lb (T))

4. The structure shown is a truss composed of axial members pinned together at the joints. The stucture is pinned to the floor at point E and supported by a roller at point F. Determine the external force support reactions and the force in members HI, HC and DC by method of sections.


(Fx = -28,000 lb, Fy = - 22,500 lb,Ey = 22,500 lb
HI = 12,650 lb (T), HC = 3000 lb (T)
CD = 10,500 lb (C))

5. The structure shown is a truss composed of axial members pinned together at the joints. The stucture is pinned to the floor at point A and supported by a roller at point L.Determine the external force support reactions and the force in members DF, DG and EG by any method.

(Ay = 14,000 lb, Ly = 18,000 lb, DF = 30,600 (C), DG = 10, 420 (C), EG = 23,330 (T))