Table 2 Effective width for legs of steel angles (Bambach and Rasmussen (2004a, b) and modification).

SS \( \ge \) Free

\( \psi \ge 0 \)

\( k_{b} = \left({\frac{0.578}{\psi + 0.34}} \right) + C_{k} \left({\frac{{b_{s}}}{{s_{t}}}} \right)^{2} \)

\( C_{k} = 2.5 - 2.5\,\psi + \,1.0\psi^{2} \)

\( \rho =\frac{{\left({1 - \alpha \frac{1}{\lambda}} \right)}}{\lambda} \)

\( \psi < 0 \)

\( k_{b} = \left({1.7 - 5\,\psi + \,17.1\psi^{2}} \right) +C_{k} \left({\frac{{b_{s}}}{{s_{t}}}} \right)^{2} \)

\( C_{k} = 2.5 - 1.2\,\psi - 0.6\psi^{2} \)

\( \rho =\left({1 + \psi} \right)\frac{{\left({1 - \alpha \frac{1}{\lambda}} \right)}}{\lambda} \)

Free \( \ge \) SS

\( \psi \ge 0 \)

\( k_{b} = \left({0.57 - 0.21\,\psi + \,0.07\psi^{2}} \right) + C_{k} \left({\frac{{b_{s}}}{{s_{t}}}} \right)^{2} \)

\( C_{k} = 1.25 - 0.25\,\psi \)

\( \rho =\frac{{\left({1 - \alpha \frac{1}{\lambda}} \right)}}{\lambda} \)

\( \psi < 0 \)

\( \rho =\left({1 - \psi} \right)\frac{{\left({1 - \alpha \frac{{\left({1 - \psi} \right)}}{\lambda}} \right)}}{\lambda} \)