Existing Door in AC comes into Revit as "New Construction"

[Brandon-W_DWa]

I am currently testing IFC geometry and mapping workflows between Archicad and Revit (almost all of our consultants are in Revit). I'm getting close, but I still haven't figured out why my existing doors, hosted in existing walls, are being imported into Revit as new construction, even when the associated wall comes in correctly as existing. What IFC translator setting could I be missing?

*Edited for grammatical errors.

Operating system used: Mac Apple Silicon 12.6.7 Monterey

[Laszlo Nagy]

Is the Renovation Status for both Walls and Doors set properly to "Existing" in Archicad?

[Brandon-W_DWa]

Yep! An existing door hosted within an existing wall.

[Laszlo Nagy]

One suggestion would be for the Revit team to install the free IFC Model Exchange with Archicad for Revit 2024 Add-In.

I just checked its documentation:

https://help.graphisoft.com/Revit/INT/IFC_Model_Exchange_with_ARCHICAD_for_Revit_2024.pdf

and it says:

Mapping of Archicad Renovation Status to Revit Phasing: Archicad “Renovation Status” is converted to Revit “Phasing” data. Phase mapping takes place based on the current Revit template’s first and last project phase, as defined in IFC Options (Open menu).

So, if the default IFC Exchange does not give the desired results, you might try using the above Add-In in Revit.

If you do it, please let us know how it goes.

[Brandon-W_DWa]

The IFC Model Exchange Add-in is what I used for these tests, which resulted in the unsuccessful phasing of the doors.

[Laszlo Nagy]

I see.

I just quickly checked the Revit Help files and I found this:

https://help.autodesk.com/view/RVT/2025/ENU/?caas=caas/sfdcarticles/sfdcarticles/Is-it-possible-to-i...

It says that " it is not possible to import IFC to selected phase or assign phase to imported IFC model."

So, it seems that this may be beyond the default capabilities of IFC Import in Revit.

[Brandon-W_DWa]

It's not so much importing an entire IFC into a specific phase of my choice, but rather phasing elements correctly based on the appropriate predefined phases that are established in the Revit file (as noted in the Graphisoft-provided documentation regarding the IFC Model Exchange Add-in).

Below is a screenshot inside my trial of Revit, in which I imported an IFC (using the Graphisoft-provided Add-in) into a clean, default Revit template with the default phases (Existing & New Construction). The model I created in Archicad 27 (to then export as an IFC and import into Revit) contains enough geometry so that every IFC Class was represented (hence the abundance of MEP equipment). After I created my little sample building (all of which was set to "Existing Status"), I copied it to the right twice, making the first copy entirely "To Be Demolished Status", and second entirely "New Status". Each sample building contains about 70 modeled elements, representing around 48 IFC Classes.

Now in Revit, when I set the Phase Filter to "Show New", you can see that everything phased correctly, EXCEPT the (1) door and (1) window in the left sample building (the one that was set to "Existing Status" in Archicad. The mesh (Toposolid in Revit) came in as a single element, so I'm not surprised that it was phased weird.

Does that help clear up the issue I'm facing? I'm not sure what it is about doors that messes up the Phase mapping. I posted this same question in the Autodesk forums, to see if it's a Revit thing. Thanks!

[Laszlo Nagy]

If you open the IFC file exported from Archicad in an IFC Viewer, and the Doors show the correct Renovation Status there, it means it was correctly exported from Archicad, then I would assume there is something on the Revit side when the IFC is imported that causes that setting in the IFC file to get lost or translated incorrectly.

[Brandon-W_DWa]

Your hunch was correct - checking the IFC in Solibri shows that each door is correctly phased as "Existing", "To Be Demolished" and "New". While this issue could in some ways be considered closed, it still seems like a significant problem that doors aren't phased correctly. We don't practice in healthcare markets, but I can imagine the headache for my engineers if they had to manually re-phase thousands of doors for a large hospital project.

[Laszlo Nagy]

Thanks for checking and reporting the results. Good to know that it is not an issue with Archicad's IFC Export.

I think you should raise this issue on the Revit forums. They might be able to offer a workaround, but if they can't, Revit development should be informed so they can correct this potential bug.