Method of Joints

Method of Joints Basic Concept

4/1 Determine the force in each member of the loaded truss. Explain why knowledge of the lengths of the

members is unnecessary.

4/2 Determine the force in each member of the loaded truss. Identify any zero-force members by inspection.

4/3 Determine the force in each member of the loaded truss.

4/4 Determine the force in each member of the loaded truss.

4/5 Determine the force in each member of the loaded truss.

4/6 Calculate the force in each member of the loaded truss. All triangles are isosceles

4/7 Determine the force in member AC of the loaded truss. The two quarter-circular members act as two-force members.

4/8 Determine the force in each member of the loaded truss. Make use of the symmetry of the truss and of the loading.

4/9 Determine the force in each member of the loaded truss.

4/10 Determine the forces in members BE and CE of the loaded truss.

4/11 Calculate the forces in members CG and CF for the truss shown.

4/12 Each member of the truss is a uniform 8-m bar with a mass of 400 kg. Calculate the average tension or compression in each member due to the weights of the members.

4/13 A drawbridge is being raised by a cable EI. The four joint loadings shown result from the weight of the roadway. Determine the forces in members EF, DE, DF, CD, and FG.

4/22 Determine the force in member BF of the loaded truss.

4/27 The tower for a transmission line is modeled by the truss shown. The crossed members in the center sections of the truss may be assumed to be capable of supporting tension only. For the loads of 1.8 kN applied in the vertical plane, compute the forces induced in members AB, DB, and CD.