System families are predefined in and saved in templates and projects, not loaded into templates and projects from external files.
You can duplicate (copy) and modify the types within system families to create your own custom system family types.
Before you begin a project, use the workflow that follows to determine whether you can use existing system family types, or whether you need to create your own custom system family types.
- Determine the system family types that your project requires.
- Search existing system families and determine if you can find the system family types that you need in Revit LT templates or in your office templates.
- If you can find a system family type that is similar to the family type that you need, save design time by modifying it to meet your needs.
- If you cannot find the system family type that you need and you cannot modify a similar family type to fit your needs, create your own system family type.