Worth noting (6/5/24) HSS rectangular and square A500 Grade C is now the predominant/preferred material. This is F[sub]y[/sub] = 50 ksi material versus the previously more common Grade B F[sub]y[/sub] = 46 ksi. (See Steel Tube Institute seminar, June 6, 2024) (This isn't on the website yet). (still not found, 8/26/24).
The previous version appears to be in Modern Steel Construction, April 2018.
There appears to also be versions from February and April 2015.