Given: A and B are both made of wood and are 40 in. thick, the ultimate shear stress for the wood 900 psi and a factor of safety of 3.0 is required under a load of P = 700 lb Determine: to the nearest 1/4 in. the smallest dimension h of the vertical segment so that it does not fail in shear. B 12 A

Question 4 A 6 KN force is applied at the free end of a wood (E = 12GPa) beam with dimensions given in Fig. Q4. Neglecting the effect of fillets and stress concentration, determine (a) the maximum compressive stress and its location at section A-A; (b) the maximum shearing stress and its location at section A-A; (c) the deflection at section A-A. 6 kN 300 mm 400 mm ΤΑ 叶 ¡A Fig. Q4 96 mm -- 12 mm 12 mm 48 mm