ABSTRACT
Non-uniform stepped and tapered members are often used because of the economies produced by reducing the cross-section in the low moment regions. While the cross-section reductions are usually determined by in-plane bending considerations, these reductions may significantly reduce the member's resistance to flexural-torsional buckling, by reducing the cross-sectional out-of-plane rigidities EIy, GJ, and £ / w . The flexural-torsional buckling of stepped and tapered members has been reviewed in [1 -4 ] .
