A pontoon bridge (see figure) is constructed of two longitudinal wood beams, known an balks, that span
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For purposes of design, assume that a uniform floor load of 8.0kPa acts over the chesses. (This load includes an allowance for the weights of the chesses and balks.) Also, assume that the chesses are 2.0m long and that the balks are simply supported with a span of 3.0m. The allowable bending stress in the wood is 16 Mpa.
If the balks have a square cross section, what is their minimum required width bmin?
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