The composite beam shown in the figure is simply supported and carries a total uniform load of 50 kN/m on a span length of 4.0 m. The beam is built of a wood member having cross-sectional dimensions 150 mm ×250 mm and two steel plates of cross-sectional dimensions 50 mm ×150 mm
Determine the maximum stresses ss and sw in the steel and wood, respectively, if the moduli of elasticity are Es= 209 GPa and Ew= 11 GPa. (Disregard the weight of the beam.)