I would suggest the driving element here is the functionality of each Tool - Structural Column v Structural Framing
In theory the same profile is used for both but how they are used in the model in placement terms may define which Category you prefer.
I know most would keep it inline with how Revit currently works and have Structural Columns and Framing as the tools and properties are geared different for each application but there is nothing to stop your simply using Structural Framing throughout.
Jay Colcombe
Autodesk Certified Instructor
Revit Architecture & Structure Certified Professional
AutoCAD Certified Professional
B.Sc. Hons Civil & Structural Engineering
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