Gere & Goodno — Axially Loaded Members: Problem 2.6-11

2.6-11 The plane truss in the figure is assembled from steel UPN 220 shapes (see Table 3 in Appendix F). Assume that \( L = 3 \text{ m} \) and \( b = 0.71 L \). (a) If load variable \( P = 220 \text{ kN} \), what is the maximum shear stress \( \tau_{\max} \) in each truss member? (b) What is the maximum permissible value of load variable \( P \) if the allowable normal stress is 96 MPa and the allowable shear stress is 52 MPa?