Use LRFD and select the lightest W12 shape of A992 steel to be used as a beam– column in an… 1 answer below »

Use LRFD and select the lightest W12 shape of A992 steel to be used as a beam– column in an unbraced frame. The member length is 16 feet, and the effective length factors are Kx = 1.0 (nonsway), Kx = 2.0 (sway), and Ky = 1.0. Factored loads and moments based on first-order analyses are Pu = 75 kips, Mnt = 270 ft-kips, and Mlt = 30 ft-kips. The frame analysis was performed consistent with the effective length method, so the flexural rigidity, EI, was unreduced. Use Cm = 0.6 and Cb = 1.67. Bending is about the strong axis.

 

 

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