Revit families are categorized into three main types:
1. System Families: These families cannot be created or loaded as individual family files. They are defined solely by the default parameters provided within the Revit system software. Examples of system families include walls, roofs, floors, dimensions, grids, and elevations. Using the “transfer” function, system family types can be shared and used across different projects.
2. Built-in Families: As the name implies, these families are created directly by designers within a project. Built-in families are exclusive to the project they are created in, meaning they cannot be saved separately as “.rfa” files. Unlike system families, they cannot be transferred to other projects using the “transfer” function. Typically, each built-in family corresponds to a single family type.
3. Loadable Families: Loadable families can be imported into a project at any time and saved independently as “.rfa” family files. Revit provides family template files that allow designers to create families in various forms. Common examples of loadable families include doors, windows, structural columns, and interior decorative components.
Classification of Revit Families
Loadable Families
Concept: These are files created outside the project with the “.rfa” extension using family templates.
Features: They are customizable and can be imported into any project.
System Families
Concept: These family types are predefined within the project and can only be created or modified inside it.
Features: They cannot be saved as external files but can be copied, pasted, and transferred between projects and templates.
Built-in Families
Concept: Families created within the current project.
Features: They are stored only within the current project file, cannot be saved separately as “.rfa” files, and are not usable in other projects.
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