A so-called "trapeze bar" in a hospital room provides a means for patients to exercise while in bed (see figure). The bar is 2.1m long and has a cross section in the shape of a regular octagon. The design load is 1.2kN applied at the midpoint of the bar, and the allowable bending stress is 200Mpa.
Determine the minimum height of the bar. (Assume that the ends of the bar are simply supported and that the weight of the bar is negligible.)

Transcribed Image Text:

h