What is a Revit ʼLoadable Familyʼ?

ByCADbrief Staff

Short Answer

A Revit loadable family is a reusable component file, usually created as an .rfa, that you build separately and insert into a project with Load into Project. It is the standard professional method for doors, furniture, fixtures, and custom content. Limitation: not every category should be modeled as a loadable family.

What You Need to Know Before

Warning: A loadable family can break schedules, tags, or visibility if the family category, host type, or shared setting is chosen incorrectly at creation time. A common failure is building a face-based or non-shared family when the project actually needs hosted scheduling and tagging behavior.

How to Load a revit family

  • Command: Load into Project

  • Shortcut: None by default

  • Quick Steps:

    1. In the family editor, create or open the .rfa family, then go to the Ribbon: Create or Modify tab > Load into Project panel.
    2. Click Load into Project and choose the target open project if more than one model is open.
    3. In the project, place the family using the relevant component tool, and confirm key options such as Family Category and Parameters > Shared if the element must schedule or tag independently.

Variables & Settings

  • Key Setting: Family Category and Parameters > Shared

  • Expert Setting: When Shared is enabled, the nested or loaded family can appear separately in schedules, tags, and quantity takeoffs. If it is off, the family may only behave as part of its host family, which often causes documentation issues.

Why it Fails

  • Cause 1 (Geometry): The family was created with the wrong template or host type, so it cannot place correctly on walls, ceilings, faces, or levels.
  • Cause 2 (layers/Locks): Reference planes, constraints, or locked dimensions are over-constrained, causing the family to fail when type parameters change.
  • Cause 3 (Command/Logic): The family category or shared status does not match the intended workflow, so it loads but will not tag, schedule, or behave like the expected project element.

Quick Fix & Best Practice

  • Quick Fix: Open the family in Family Editor, check Family Category and Parameters, correct the category or Shared option, then use Load into Project again and overwrite the existing version and parameter values as needed.
  • Manager’s Verdict: Use loadable families for repeatable project content that needs controlled geometry, parameters, and documentation. Avoid them for system-built elements better handled by native Revit system families.

FAQ

What file type is a Revit loadable family?
Usually an .rfa file.

Can a loadable family be scheduled in Revit?
Yes, if its category and shared behavior are set correctly.

Is a loadable family the same as a system family?
No, loadable families are separate family files, while system families are built into the project environment.

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