고체역학 (Beer) — Shearing Stresses in Beams: Problem 6.6

6.6 Solve Prob. 6.5, assuming that the reinforcing plates are only 9 mm thick. 6.5 The rolled-steel beam shown has been reinforced by attaching to it two 12 × 175-mm plates, using 18-mm-diameter bolts spaced longitudinally every 125 mm. Knowing that the average allowable shearing stress in the bolts is 85 MPa, determine the largest permissible vertical shearing force.