Four identical bolts (A, B, C, D) with yielding strength Sy=240 MPa are usea as fasteners in the bracket shown in the figure. (a) Determine both magnitude and direction of the total shear force on these fasteners (A, B, C, D). (b) Base on the maximum shear force above and safety factor of 2, find the minimum diameter for the bolts. (c) By using the diameter you select, estimate the maximum bearing stress in the bolts. 250 10 $ + B of 2016 A -75-7550 4 bolts 60 60 15 4 -300- F = 16 kN 200