1. A T-shaped beam with an overhang is supported and loaded as shown in Fig. 1. Draw shear force diagram and calculate (a) the shear stress at a point D, 2 m from support A and 25 mm from the top of the beam; (b) the greatest shearing stress. 4 kN/m 3 kN C A D B 2 m 3 m 1 m 60 mm 20 mm 25 mm D 60 mm 20 mm Fig. 1