Question:
In RF‑/STEEL EC3, there are no effective lengths displayed for the minor axis and the lateral-torsional and torsional-flexural buckling in Window "Effective Lengths - Members/Sets of Members." Why?
Answer:
If you have selected the equivalent member method for a straight set of members, it is possible to define lateral supports in Window 1.4. These prevent buckling about the minor axis of the set of members. If the results show different buckling lengths of the set of member, no values are entered for L-cr,zw, L-w, and L-T in Table 1.6.