connection details. The structure shown was designed to support a load F. It consists of a boom AB with a 30 x 50-mm rectangular cross section and a rod BC with a 20-mm-diameter circular cross section. The boom and the rod are connected by a pin at B and are supported by pins and brackets at A and C, respectively. If F is equal to 45 kN, calculate 1. The axial stress in BC. 2. The axial stress in AB. 3. The shear stress in the bolt at A. 4. The shear stress in the bolt at C. 600 mm 50 mm d = 20 mm -800 mm- F d=25 mm 20 Flat end 40 mm 600 mm FRONT VIEW 25 mm 50mm $25 mm 30 mm 25 mm TOP VIEW OF ROD BC d=20 mm d=20 mm 800 mm F TOP VIEW OF BOOM AB d=25 mm Flat end F END VIEW 20 mm 20 mm