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Question

two W8 X 31 rolled sections may be welded at A and B in either of the two ways shown. For each arrangement,

determine the moment of inertia of the section with respect to the horizontal controidal axis.

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sol-8415926-125.xlsx

W 8X31 wll dimension are in inch
Y
bf=7.995
tf=0.435 d=8.000 X X
tw=0.285 For single W8X31 we know Now for case a, Ixx=
512.16 in^4
Now for case b, Iyy= 365.9949 in^4 ans
ans A=
Ixx=
Iyy= Y
9.13...

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