Problem 01.054 - Analysis of an inverted T-frame In the steel structure shown, a 6-mm-diameter pin is used at C and 12-mm-diameter pins are used at B and D. The ultimate shearing stress is 150 MPa at all connections, and the ultimate normal stress is 390 MPa in link BD. Knowing that a factor of safety of 3.0 is desired, determine the largest load P that can be applied at A. Note that link BD is not reinforced around the pin holes. A Front view D D 6 mm 18 mm B B Side view 160 mm 120 mm B Top view The largest load P that can be applied at A is 1.679 kN.