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927_Mechanics Homework Mechanics of Materials Solution

927_Mechanics Homework Mechanics of Materials Solution -...

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Unformatted text preview: PROBLEM 8.12 8. 9 through 8 14 Each of the following problems refers to a rolled-steel shape selected m a problem of Chap. 5 to support a given loading at a minimal cost while satisfying the requirement 0,, s 0,“. For the selected design, determine (a) the actual value of 0,, in the beam, (lb)m the maximum value of the pn'ncipal stress am at the ‘ junction of a ﬂange and the web. 1.5 kips/lt 8.12 Loading of Prob. 5.84 and selected W18 x 50 shape. FWDM PV‘o'bjtaM 5.99 61“ r 2"} k3: 13\$ Ia-PH = 1e 20 kg»... .d B I8 £13: at!“ B 17.96: in , b; r 7.435... t. = 0.570 cm. J , 5,: 82.9.3) mid: 9.49:: .w. I3.22 k5; 4‘ 8.425 In 9.7: .3. Q = A”? = 37.21.". (I3)C37.2I) .3 I. (Soo)(o 3&5) 2 G k5 R r 4(553 ()2 Y“ = {8.555% 2.34“ = 8-255)....- Gm, 2 + R = 8.535+8.8\$'5‘ = 17.39 ks? ...
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