Each of the three rolled-steel beams shown (numbered 1,
Chapter 5, Problem 5.91(choose chapter or problem)
Each of the three rolled-steel beams shown (numbered 1, 2,and 3) is to carry a 64-kip load uniformly distributed over thebeam. Each of these beams has a 12-ft span and is to be supportedby the two 24-ft rolled-steel girders AC and BD. Knowing that theallowable normal stress for the steel used is 24 ksi, select (a) themost economical S shape for the three beams, (b) the most economicalW shape for the two girders.
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