QUESTION 1 (10 marks) 20 kN 60 kN B C D 2 m 6 m 2 m The simply supported beam shown above has two point loads, at the two locations A and C shown above. a. Find reactions at B and D, and then NEATLY draw the shear force and bending moment diagrams. Don't forget to label the axes and show all values. (7) b. What is the maximum bending stresses with a W410x60 profile? Compare the factor of safety using aluminum alloy 2014-T4 to structural steel ASTM-A36. (3) Units: KN-m QUESTION 2 (10 marks) 40 kN 35 kN/m 40 kN 60 kN/m A B C D 2.4 m 3.0 m 4.6 m 40.0 kN 40.0 kN 60.0 kN/m 35.0 kN/m Units: KN 2.4 m 3 m 4.6 m 315.59 kN 191.59 -40.00 -124.00 86.59 46.59 @x-6.18 m 238.57 2.0 m 2 m 389.41 kN 160.00 -229.41 40 kN E 40.0 kN 40.00 A loading has been analyzed, with reactions, shear force, and bending moments as shown to the left. a. What is the minimum required section modulus for a material that has an allowable yield strength of 200 MPa? What is this modulus if yield strength is only 150 MPa? (3) b. Select the most economical W530, W460, and W410wide flange sections from the table in the textbook, for each of the three materials. (3) c. Confirm the sections chosen by checking the maximum stress values in the sections that you have chosen. (3) d. If a hole needs to be drilled to hang a lightweight attachment (