I noticed that most of the Structural Steel Shape Profiles (RFA) are missing from the REVIT Architecture installation but they do come with the RST installation.
So I copied the RST steel shape RFA files over to my RAC Library folder. I thought that some people who only have RAC may also want a copy of the RST steel shape profiles, so you can download the zip file below that contains the files listed in the image below.
Download> RST 2009 Structural Steel Profiles