Typically, the loadable families that you need to create are standard sizes and configurations of common components and symbols used in a building design.
To create a loadable family, you define the geometry and size of the family using a family template that is provided in Revit. You can then save the family as a separate Revit family file (.rfa file) and load it into any project.
Depending on the complexity of the family, the creation process can be time-consuming. If you can identify a family that is similar to the one you want to create, you can save time and effort by copying, renaming, and modifying the existing family.
The topics in this section apply to the creation of model (3D) families, but some are relevant to 2D families, including titleblocks, annotation symbols, and detail components.