Notches!?! We don't need no stinkin' notches! About a year and a half ago I put up a white paper on Structural Shape Authoring with Inventor. Since then I changed my blogging system and the post was lost to the nether realm of the internet, but I still have the original paper.
Keep in mind this is a little dated, but the content is still sound. The only change is the fact you can do notch profiles now which I have by request on the forums updated here with a video and some screen grabs for you IT strangled. First the video...
Now the screen grabs...
Start off with your shape fully designed for the use of Structural Steel Authoring following the tips in the white paper on simplicity. Also include a notching sketch that would signify how you would want adjoining members to be notched based on how they sit in the Frame Generator. This is the critical step in a notch profile, making sure you understand the layout of the frame before notching takes place and for most users is common knowledge based on their experience with the type of shape being used.
In the Authoring dialog box, choose your Category to choose mapping functions. In my case I have already created a Read/Write Content Center library and created a Category called Imaginit Shapes. It is imperative that you do these steps before the actual process of Authoring or Publishing or will go nowhere fast. Select the Base Extrusion, and a default base point. I chose the midpoint of the left edge. The added option here is the newer feature of a notching profile. Select this and then grab your notching profile as well as your original shape profile (otherwise it may not notch the way you want and you could get floating geometry).
Start the Publish Part command and follow the same steps in the white paper to publish to the Content Center.
Inside a Frame Generator ready assembly, start the Insert Frame command and select your standard. Here you can see the published part that I am using with the Custom Point for the placement. Continue to create the frame assembly as normal.
When it comes time to perform notches to your pieces, start the Notch command. Pick your two members and then you will see an option to Apply notch profile which will use the profile selected during the Structural Shape Authoring process.
The resultant is a perfectly notched frame piece. Before this had to be done by witchcraft and part level editing that would frustrate users that did not have a perfectly nominal frame design or wanted complex notching of the custom or oddly shaped frame pieces.