A W14 × 74 of 50 ksi steel is to be investigated for use as a beam–column in an unbraced frame. The length is 14 feet. First-order analyses of the frame were performed for both the sway and the nonsway cases. The factored loads and moments corresponding to one of the load combinations to be investigated are given for this member in the following table:
Bending is about the strong axis, and all moments cause double-curvature bending (all end moments are in the same direction, that is, all clockwise or all counterclockwise). The following values are also available from the results of a preliminary design:
Use Kx = 1.0 (nonsway case), Kx = 1.7 (sway case), and Ky = 1.0. Use LRFD and determine whether this member satisfies the provisions of the AISC Specification for the given load combination.