Question 1: [10 marks] - Two solid cylindrical rods AB and BC are welded together at B and loaded as shown. The two rods are made of different tensile strength steel. Use Esteel = 200 GPa. A) Knowing that the ultimate normal stress of the material is 450 MPa for rod AB and 375 MPa for rod BC, determine the smallest allowable values of d1 and d2. Use a factor of safety of 2.5 for both sections. B) Using the values form section A determine the total displacement of the system at point C. A 300 mm B d 40 kN 40kN 250 mm C -d 30 kN Question 2: [20 marks] - The Fig below shows the roofing support system at the entrance of Stauffer Library, Queen's University. The structural engineer calculated the combined loading from dead load, wind load and snow resulted in a tensile load of P equal to 12 kN on each side of the rod as shown below. Determine the required diameter of the rod that will satisfy the following requirements: a) The allowable tensile stress of the rod is 300 MPa, b) The axial deformation on the 1.5 m (one side) of the rod is limited to 1 mm, c) The allowable shear stress is 250 MPa, d) The allowable bearing stress between the rod and the plate is 300 MPa, Use thickness of the plate to be 12 mm and Esteel = 200 GPa. Joseph S. Rauffer Like 20 P