Extracted text: PROB. 5.5-11 5.5-12 A small dam of height h = 2.0 m is constructed of vertical wood beams AB of thickness t = 120 mm, as shown in the figure. Consider the beams to be simply supported at the top and bottom. Determine the maximum bending stress omax in the beams, assuming that the weight density of water is y = 9.81 kN/m². h