Question 4: Select an appropriate W310 section of ASTM A992 steel (F, = 345 MPa) as the beam-column in an unbraced frame subjected to the factored loads, including biaxial bending moments, as shown in Fig. 4. The beam-column is laterally braced at the two ends only. (Hint: I would start with W310x118 and then decide if this is an appropriate choice or a heavier/lighter section is necessary depending on the outcome of checking interaction equations.)

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Members with compression and bending

Compression members are structural elements that carry compressive axial force. They are the vertical members of a building that support beams and their design, which is governed by buckling and strength. Columns are known as struct or compression members, which are subjected to compressive forces. These members provide stiffness to the building and avoid any imperfection regarding the transfer of axial load. For instance, webs in a truss, braces in a framed structure, tiers, and so on.