I have never been a fan of HSS to WF moment connections, they are just more involved than a WF col solution, HSS columns are so limited in their I vs. a WF col, and, typically, they completely violate the strong column / weak beam principle. However, we just had to use one for a canopy frame...
It has been said that as a small firm you spend most days hunting elk, but you usually end up eating squirrel. I would add the caviate (from experience) that you have to be careful when you catch an elk: They can kick a lot harder than a squirrel.
There are more issues to consider than has...
