Figure 9-42 Full Alternative Text 9-43. Determine the principal stresses in the box beam at point B. Show the results on an element located at this point. Prob. 9-43 -2 ft 10 kip 4 in. A B 1.5 ft. 4 in. HA B 16 in.! 4 kip 0.5 ft 13 in. 13 in. 2 ft-
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