Answer:
If your buckling stiffeners are not defined via the complete buckling length, the PLATE‑BUCKLING program will automatically generate this stiffness as a result member, including the effective width, and the eigenvalue calculation is performed using the BUCKLING add-on module. This then results in the critical buckling stress of the member and thus of the stiffener. The length of the equivalent member is the stiffener length. Currently, it is not possible to display the internal results in detail.