You need to Autodesk subscripted member to install the extensions of the Revit via subscription portal
This will generate families for reinforcing bars & open a window Content Generator
Change the region to load standards specific to your region, go to file & select Regional Settings
Below window will open
Select Region & hit Ok, this will load the data
Once loaded select Reinforcing bar to check the data base loaded, check all the shapes you need in file and hit OK
Now you can start modeling Rebar in 3D with proper bar shape loaded either manually or with extensions
Once you have install the extension for Revit
Under Extension menu, for Tools select Content Generator
This will generate families for reinforcing bars & open a window Content Generator
Change the region to load standards specific to your region, go to file & select Regional Settings
Below window will open
Select Region & hit Ok, this will load the data
Once loaded select Reinforcing bar to check the data base loaded, check all the shapes you need in file and hit OK
Now you can start modeling Rebar in 3D with proper bar shape loaded either manually or with extensions
