Truss members supporting a roof are connected to a 26-mm-thick gusset plate by an 18-mm diameter pin, as shown in the figure and photo. The two end plates on the truss members are each 14 mm thick. Disregard friction between the plates. Roof structure Truss member. P End plates Pin Gusset plate t = 14 mm Truss members supporting a roof 26 mm Ⓡ (a) If the load P= 60 kN, what is the largest bearing stress acting on the pin? (Enter the magnitude in MPa.) MPa (b) If the ultimate shear stress for the pin is 190 MPa, what force P ult is required to cause the pin to fail in shear? (Enter the magnitude in kN.) kN

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