Question: Select the lightest W 1 2 section available to support working tensile loads of PD = 1 2 0 k and PE = 1 6

Select the lightest W12 section available to support working tensile loads of PD =120 k and PE =160 k.
The member is to be 18 ft long and is assumed to have two lines of holes for 3/4-in bolts in each flange.
There will be at least three holes in each line 3 in on center. Use LRFD, Fy =50 ksi and Fu =65 ksi, and
neglect block shear.

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