HW_6 Solutions - First Draw FBD of whole structure. (a) Sum...

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First Draw FBD of whole structure. (a) Sum Moments about E lb E E F lb E E F lb D ft D ft lb ft lb M Y Y Y X X X Y Y E 350 0 300 650 500 0 500 650 0 ) 6 ( ) 3 ( 300 ) 6 ( 500 = = - - = = = + - = = = - + = Next move to member BC see FBD (c) X Y Y X X Y Y Y Y Y B B C C B F lb B B F lb C ft C ft lb M = = + - = = = + + - = = = + - = 0 150 0 150 300 150 0 ) 3 ( ) 5 . 1 ( 300 Need to Move to next Member to solve. FBD (b) lb B ft B ft lb ft lb M X X A 575 0 ) 3 ( ) 5 . 1 ( 150 ) 3 ( 650 = = + + - = Find Magnitude of resultant force lb B B F F Y X C B 24 . 594 150 575 2 2 2 2 = + = + = = Use shear stress formula Remember since double shear use either twice area Or half the force ksi psi in lb A V C B C B 05 . 6 6053 25 . 0 4 2 24 . 594 2 2 = = = = = = t t p t t
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The horizontal force is pushing directly The wall it won’t have an impact The vertical force will cause the bottom Lip to shear off FBD of lip Evaluate Shear Stress against allowable . 4
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This note was uploaded on 04/01/2008 for the course ME 211 taught by Professor Thouless during the Spring '08 term at University of Michigan.

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HW_6 Solutions - First Draw FBD of whole structure. (a) Sum...

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