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Question: A 50-mm-by-300-mm scaffold timber plank, placed flatwise, must carry a uniformly distributed line load of 1.50 kN/m without exceeding an allowable bending stress of 11.0 MPa and an allowable shear stress of 0.83 MPa. Calculate the maximum allowable simple span length. Use full nominal dimensions and neglect the weight of the plank.

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