PROBLEM 5.Determine the support reactions for the truss loaded with uniform wind load shown. 9 kN/m 6 kN/m 5 m SUMMARY OF ANSWERS NA RB 12 m 12 m
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- The truss above has concentrated loads as shown. The wind loads of 25 KN are perpendicular to the member AF. The forces acting on all members by the method of sectionsThe truss above has concentrated loads as shown. The wind loads of 25 KN are perpendicular to the member AF. The forces acting on all the members by the method of joints.The supporting structure of the billboard is attached to the ground by a pin at B, and its rear leg rests on the ground at A. Friction may be neglected. Point G is the centre of the gravity of the billboard and structure, which together weigh 2800 lb. To prevent tipping over in high winds, a 2370-lb weight is placed on the structure near A , as shown. (a) Compute the magnitudes of the reactions at A and B if the wind load on the billboardis q = 120lb/ft. (b) Find the smallest wind loads q that would cause the structure to tip over.
- The truss has concentrated loads as shown. The wind loads of 25KN are perpendicular to the member AF. Solve for the forces acting on the members BE, DE, DG by the method of joints.find forces Cy, Ay, and Bx and ByPROBLEM 2: The roof truss shown is supported on rollers at A and is hinged at B. The wind loads H1, H2, and H3, actperpendicular to the top chord. Analyze the truss based on the stated conditions. Indicate “C” for compression and “T”for tension.Given:S = 3.0 mH = 1.5 m Required: 1. Force in member DE (kN) due to the load, P = 105 kN.Wind loads = 0 (Answer: 157.500 (T)) 2. Force in member DE (kN). (Answer: 25.931 (T))Given: H1 = 16 kN; H2 = 27 kN; H3 = 11 kN; P = 0 3. Force in member DE (kN). (Answer: 183.431 (T))Given: H1 = 16 kN; H2 = 27 kN; H3 = 11 kN; P = 105 kN
- The supporting structure of the billboard is attached to the ground by a pin at B, and its rear leg rests on the ground at A. Friction may be neglected. Point G is the center of gravity of the billboard and structure, which together weigh 2800 lb. To prevent tipping over in high winds, a 2370-lb weight is placed on the structure near A, as shown. (a) Compute the magnitudes of the reactions at A and B if the wind load on the billboard is q = 120 lb/ft.Draw the influence line of member CG of the truss shown.Determine the force carried by each member of the truss.
- The truss above has concentrated loads as shown. The wind loads of 50 KN are perpendicular to the member AF. Solve for the forces acting on the members BE, DE, DG, FG by the method of joints.Solve Prob. 10.45 assuming that the workers are lowered to a point near the ground so that θ = -20°.Reference to Problem 10.45:The telescoping arm ABC is used to provide an elevated platform for construction workers. The workers and the platform together weigh 500 lb, and their combined center of gravity is located directly above C. For the position when θ = 20°, determine the force exerted on pin B by the single hydraulic cylinder BD.The supporting structure of the billboard is attached to the ground by a pin at B, and a roller at A. Point G is the center of gravity of the billboard and structure, which together has a weight of 1400 N. To prevent tipping over in high winds, a 1200-kg mass is placed on the structure near A, as shown. Compute the magnitudes of the reactions at A and B if the wind load on the billboard is q = 1200 N/m.