For nonsymmetric shapes whose cross-sections do not have any symmetry, either about an axis or about a point, the elastic torsional-flexural buckling stress should be determined by rational analysis or by tests. See AISI Design Manual [41].

In addition to the above design provisions for the design of axially loaded columns, the AISI Specification also provides design criteria for compression members having one-flange through-fastened to deck or sheathing.

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