Risposta:
Quando si progettano sezioni trasversali generali nel modulo aggiuntivo RF-STEEL AISC, viene visualizzato un messaggio "Non progettabile" per il tasso di lavoro. General cross-sections are defined in the program as user-defined sections or shapes which are not included in the specification. Though, some user-defined cross-sections can be designed under specific conditions. The warning message is displayed because shear buckling is not provided for general cross-section in the AISC 360‑16 [1] Chapter G. More info on this topic can be found in the RF‑STEEL AISC manual linked below.
This warning can be turned off in RF‑STEEL AISC add-on module under the "Details" button → Shear Buckling → "Shear buckling warning for general cross-section."
