With the 22nd edition of API RP 2A-WSD now published and it is now specifically clarified that AISC 335-89 (AISC-ASD 1989 Edition) should be used, not AISC 360-10.
I think with the current STAAD API code checker is still using the AISC 360 code for steel check.
What's the plan for Bentley to implement the STAAD API 2A-WSD with using AISC 335-89 for steel design?
I think similar problem also exists in SACS as well, where SACS also using AISC 360 for steel design check under API code checker.