Question: A rectangular beam with semicircular notches, as shown in part (b) of the figure, has dimensions h = 0.88 in. and h1 = 0.80 in.

A rectangular beam with semicircular notches, as shown in part (b) of the figure, has dimensions h = 0.88 in. and h1 = 0.80 in. The maximum allowable bending stress in the metal beam is σmax = 60ksi, and the bending moment is M = 600lb-in.
Determine the minimum permissible width bmin of the beam.

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