11-52. The simply supported joist is used in the construction of a floor for a building. In order to keep the floor low with respect to the sill beams C and D , the ends of the joists are notched as shown. If the allowable shear stress for the wood is tallow = 350 psi and the allowable bending stress is sallow = 1500 psi, determine the height h that will cause the beam to reach both allowable stresses at the same time. Also, what load P causes this to happen? Neglect the stress concentration at the notch. | |
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