After installation of the I-beam of Problem 10.12, it becomes necessary to lower the 1-beam 800 mm. This was done by adding 18.0-mm diameter aluminum alloy bars (E = 72 GPa) of length 800 mm to the steel bars. For a 60-kN load at the center of the beam located under one of the composite bars, determine the maximum stress in the beam and the rods.
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