In the last chapter ‘Concept of Revit Elements‘, we learnt about how Revit elements are organized in a hierarchy of Elements -> Categories -> Family -> Type -> Instance.
Now, let’s dig deeper into different kinds of Families available to use in Revit.
System families are predefined in Revit. You do not load them into your projects from external files, nor do you save them in locations external to the project.
Examples of System families include Walls, Roofs, Floors, Ducts, Pipes, Levels, Grids, Viewports, etc.
Unlike system families, loadable families are created in external *.RFA files and are loaded in the project. Building elements that are usually purchased, delivered and installed in/around a building such as windows, doors, electrical fixtures, furniture, mechanical equipment, plumbing fixtures, etc are examples of loadable families. Some annotation elements that require customization, such as symbols, title blocks, tags, etc are also loadable families.
In-place elements are created when you need a unique component that is specific to the current project. The in-place geometry may reference other project geometry. It may also be resized or adjusted according to the referenced geometry in the project. When you create an in-place element, Revit creates a family for the in-place element in the project, which contains a single family type.
Learn more about different kinds of families, here.