Round HSS with D/t ratios exceeding the limit set in Section F8 were unintentionally designed and incorrect capacities were output by the program.
AISC 360 Section F8 applies to round HSS with D/t ratios less than a specified limit. When the D/t ratio exceeds this limit, the program should have output a slenderness warning and reported no design.
The issue will be resolved in the release after v15.03.00.