Design Criteria for Box Columns Under Biaxial Loading

Several design criteria for isolated, simply supported welded rectangular box‐column subjected to compression and combined with biaxial bending are examined. The load carrying capacity of the columns is presented in terms of nonlinear interaction equations. In the present development, four major subjects are considered: (1) Uniaxial bending of columns; (2) biaxial strength of short columns; (3) biaxial strength of long columns; and (4) the role of residual stress.