@l.yong1 wrote:
Does anyone know where can I find L-shaped steel profile inside revit?
There are multiple options in Revit depending on the use of the word "profile". Here are there relative directory locations in the Revit family libraries.
You just need to go to the Insert tab and select the load the family type you need.
Hope this helps,
-luc
C:\ProgramData\Autodesk\RVT 2020\Libraries\US Imperial\Profiles\Framing\Steel
depending on which system you are using Imperial or Metric this is based on Windows file structure