For the pin jointed, simply supported scissors timber truss system shown in figure Q2: a) Determine the equivalent nodal loads. Draw a well labelled diagram to illustrate your solution. b) Determine and state which members would undergo pure axial loading, combined axial compression & bending and combined axial tension & bending. Give reasons for your answers. c) After a structural analysis was performed on the truss system shown in figure Q2, it was determined that the tension chords experienced a 5 kip axial force along with a bending moment. Using a 3 x 8 sawn timber trial section with a timber grade of Southern Pine (No.1), assess the validity of the trial section assuming dry exposure conditions with normal temperatures. The design considerations listed below should be computed: Axial Tension Bending Combined Axial & Bending Effects d) It is well known that shear stresses are usually accompanied by flexural stresses. Explain why a shear component is not included in the uni-axial or the bi-axial bending interaction formulations for axially loaded members.

B) 15'-0" 15'-0" a'-2" 8-10" 6-10" 120 be/H 80 lbs/it 80 lbs/tt 8'-0" 28-517.0-,5 50 lbs/tt FIGURE 02 B) 15'-0" 15'-0" a'-2" 8-10" 6-10" 120 be/H 80 lbs/it 80 lbs/tt 8'-0" 28-517.0-,5 50 lbs/tt FIGURE 02