The beam-column of A992 steel is part of a braced frame with L = 15 ft, Pu = 310 kip, Mux = 115 kip-ft. A second-order analysis was performed with factored loads and reduced member stiffnesses to obtain the moments and axial force. Bending is about the strong axis. Considering only W14x68, W14x74, and W14x82, use LRFD to select the lightest acceptable shape. Let Kx = 1.0, Ky = 1.0, and Cb = 1.0.

An unbraced beam-column with no moment frames has an Euler buckling strength of 1,861 kips with a story shear of 3.59 kips. What is the drift index for the column?

Use the Steel Construction Manual to determine the plastic moment capacity, Mp, of a W18x106 beam made of A913 Grade 60 steel.

A W14x74 of A992 steel is to be investigated for use as a beam-column in an unbraced frame. The length is 15 feet. First-order analyses of the frame were performed for both the sway and 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. The multiplier to account for P-δ effects was determined to be 1.06, and the multiplier to account for P-Δ effects was determined to be 1.25. Determine the required second-order flexural strength, Mr, at the top of the member.Type of analysisPu (kips)Mtop (kip-ft)Mbottom (kip-ft)Nonsway4906021Sway2003585 

The beam-column of A992 steel is part of a braced frame with L = 15 ft, Pu = 300 kip, Mux = 105 kip-ft. A second-order analysis was performed with factored loads and reduced member stiffnesses to obtain the moments and axial force. Bending is about the strong axis. Considering only W14x68, W14x74, and W14x82, use ASD to select the lightest acceptable shape. Let Kx = 1.0, Ky = 1.0, and Cb = 1.0.

Determine the value of the section modulus, S, about the horizontal z axis for the section. Let bf = 11 in., d = 18 in., tw = 0.250 in., and tf = 0.750 in.

A W10x88 made of A572 Grade 42 steel is subjected to a maximum bending moment of 190 kip-ft about its x-axis. Determine the maximum magnitude of bending stress in the beam.

It is assumed that if sidesway occurs in an unbraced frames, all the columns in the story must sway simultaneously.

An unsymmetrical flexural member consists of a 3” × 20” top flange, a 3” × 12” bottom flange, and a 1” × 47” web. Determine the distance from the top of the shape to the horizontal plastic neutral axis.

Use the Steel Construction Manual to determine the plastic moment capacity, Mp, of a W14x82 beam made of A572 Grade 42 steel.