1.3-9 Find support reactions at A and B and then use the method of joints to find all member forces. Let c = 2.5 m and P = 90 kN.

(b) Figure Q2(b) shows that the truss supports loads at point C and E. If the value of F = 3 kN, calculate the axial forces in members BC and BE.

A steel [E = 25500 ksi] pipe column (1) with a cross-sectional area of A1 = 5.60 in.2 is connected at flange B to an aluminum alloy [E = 17500 ksi] pipe (2) with a cross-sectional area of A2 = 4.40 in.2. The assembly is connected to rigid supports at A and C. For the loading shown, determine the normal force in the steel pipe (1).

The moment acting on the cross section of the unequal-leg angle has a magnitude of 19 kN-m and is oriented as shown in the figure. All stresses are positive if tensile and negative if compressive. Assume a = 180 mm, b- 125 mm and t- 17 mm. Determine (a) the bending stress at point H. (b) the bending stress at point K. (c) the maximum tension and the maximum compression bending stresses in the cross section. (d) the orientation B of the neutral axis relative to the +z axis. b. y K H. (typ.) Answers: (a) OH = i MPa (b) OK = MPа (c) OmaxT = MPa OmaxC = MPa (d) B = i