Can you cite your reference?
l have never heard of Frame Generator in Fusion 360.
I have heard of Frame Generator in Autodesk Inventor Professional.
(Just did a couple of videos on my YouTube Channel for my welding class - see link below.)
When I go to that link - it appears to me that that project was abandoned.
You might be able to replicate simple profiles with Pipe command or more complex profiles with Sweep command.
I wrote a similar paper on how to do this with AutoCAD many years ago that could be converted to Fusion techniques if you were interested.
Otherwise, if you are a student, you can download Autodesk Inventor Professional for free from http://www.autodesk.com/edcommunity for a robust set of tools for designed for this purpose.