John,
Thanks for your diligence in following up with my questions. To answer your question...it's the second choice. It's 3 extruded profiles that are modeled relative to each other and consist of three bodies. Sorry, I guess I shouldn't have called it an ASSEMBLY since it's not, by CAD...
Could someone explain to me how I would find the second moment of area of an I-beam ASSEMBLY that is comprised of three rectangular prisms (2 for the flanges, 1 for the web)? I've been able to do it successfully when I created the I-beam as a single extruded solid with a continuous...