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648_Mechanics Homework Mechanics of Materials Solution

648_Mechanics Homework Mechanics of Materials Solution - S...

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Unformatted text preview: S f1 [—3 PROBLEM 5.174 £J74Knowing that the allowable normal stress for the steel used is 24 ksi,.select the most economical wide-flange beam to support the loading shown. SOLUTION By symme'hy RA " RF +1213“: P.-20-(c)(sI3-20+ R; = 0 RA -.- PF :- 50 UPS. Manda-nun Bending know-new! occurs oi cede» o‘P beam. '95?! 2- D -(7)(53)+ (5)(aa)+(r.s)(3>(u) 4 M e o .r .r M: = 22L5’ kir-‘H‘ -' 2658 RIP-in. 2‘“ Ho. 75 in’ Use WZIXSZ ...
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