A wall bracket, as shown in Fig. 5.42, is subjected to a pull of P-5 kN, at 60° to the vertical. The cross-section of bracket is rectangular having b=3r. Determine the dimensions b and t if the stress in the material of the bracket is limited to 28 MPa. [Ans. 75 mm; 25 mm) 120 60 60 60° Problem 2: A crane hook has a trapezoidal section at 4-A as shown in Fig. 5.36. Find the maximum stress at points P and Q Ans. 118 MPa (tensile); 62 MPa (compressive)