A pin-connected structure is supported as shown in Figure P5.33/34. Member ABCD is rigid and horizontal before load P is applied. Bar (1) is made of brass [OY= 18,000 psi; E = 17 x 106 psi], and it has a length of L1 = 8.0 ft. Bar (2) is made of an aluminum alloy [σY=40,000 psi; E = 10 x 106 psi], and it has a length of L2 = 5.5 ft. Bars (1) and (2) each have cross-sectional areas of 0.75 in.2. Assume that a = 4.0 ft, b = 6.0 ft, and c = 1.5 ft. If the minimum factor of safety required for bars (1) and (2) is 2.50, calculate the maximum load P that can be applied to the rigid bar at D. FIGURE P5.33/34: L₁ (1) L a P C a b D טי Step-by-step solution