Calculate the maximum longitudinal stress on the cross section shown in Figure Q8 due to bending if the internal bending moment in the beam is 55 kNm. (Note: h = 305.1 mm and / = 4460 mm4) A B h A B 1.07 N/mm 1.26 N/mm tw C N b Figure Q8 C E 182.6 N/mm 188.7 N/mm 194.8 N/mm 200.9 N/mm 207 N/mm Calculate the maximum shear stress in the rectangular timber beam at the neutral axis (take y = 0 mm). The total vertical shear force acting on the beam's cross-section is 8 kN, b = 50 mm and h = 225 mm. D A Figure Q9 D 1.45 N/mm 1.64 N/mm E 1.83N/mm