As described in the specific member type sections of section 2.6 the engineer can assign an unbraced length for axial and bending design consideration. This length will override the default calculated value and be used for ALL unbraced segments considered in the design of beams, columns and braces. The user should be careful to assign an appropriate controlling unbraced length to be considered for the entire section.

Lateral torsional buckling is typically only an issue for members bending in the major axis plane and buckling perpendicular to that axis. However, for some codes and section shapes, such as a square hollow section, this limit state also applies to bending in the minor axis buckling in the plane of the major axis of the section. There is no explicit override of the bending (LTB) unbraced length for this minor axis bending case, but the assigned major axis axial unbraced length is used to determine this length. If the major axis axial unbraced length is overridden this value will also be assigned to the lateral torsional buckling limit.