1.51 Link AC is made of a steel with a 410 MPa ultimate normal stress and has a 6 × 12-mm uniform rectangular cross section. It is con- nected to a support at A and to member BCD at C by 10-mm- diameter pins, while member BCD is connected to its support at B by a 8-mm-diameter pin. All of the pins are made of a steel with a 170 MPa ultimate shearing stress and are in single shear. Know- ing that a factor of safety of 3.25 is desired, determine the largest load P that can be applied at D. Note that link AC is not reinforced around the pin holes. A 200 mm 12 mm Fig. P1.51 B 0 150 mm- C D 100 m mm P