The wooden section of the beam is reinforced with two steel plates as shown in the figure below. The allowable stresses for the wood and steel are (allow) = 6.12 MPa, and (allow) st = 150 MPa, respectively. Take Ew = 10 GPa and Est 200 GPa. (Figure 1) Figure 1 ✓ of 1 M 15 mm 150 mm 15 mm 100 mm < >