topic IFC Import--Level line is automatically created in Revit API Forum

IFC Import--Level line is automatically created

David_Robison — Tue, 16 Feb 2016 16:35:38 GMT

I have an application that creates an IFC file to be imported into Revit. When it is imported, a level line at 0m is included in each elevation. I can turn this off in each elevation manually. Is there a way to have it not display automatically? I'm not sure if all IFC files inclue this level line, or if it is something specific to the file I am importing.

Re: IFC Import--Level line is automatically created

jeremytammik — Tue, 23 Feb 2016 16:23:05 GMT

Dear Drobison,

Here is the discussion we had on this with the development team:

[Q] Is there any automated way to remove or disable the level added in elevation view by the IFC import?

[A] Revit needs at least one building story. This file doesn’t seem to have any levels in it, so it is creating a default one. This seems to be standard behaviour.

[Q] Does that mean there is no way to automatically disable the default level display? Should I file a wish for it?

[A] I don’t think it would make much sense to make a wish for this. There has to be a level in a Revit file, and default view templates show levels. I might not fully understand his issue, but I am not sure exactly what the wish list item would be.

[Q] The reason it that several levels already exist in the current project, especially there is a “Level 1”. When IFC is imported, it creates another “Level 1” with 0 m elevation, which is redundant.

[A] OK, I think I see the issue here.

In general, we expect IFC files to have at least one building story in them. If they don’t, we’ll create one.

If they do, we will reuse the Level 1 already existing in the template to avoid exactly the case below. In this case, though, because we are creating a level – not reading one from the IFC file – we don’t do the matching that we’d normally do.

The workaround is simple: add a Level 1 to the IFC file.

I’ll file a request to deal with the case where there are no levels in the IFC file.

Dear Drobison, can you please verify and confirm that this works?

Thank you!

Best regards,

Jeremy

Re: IFC Import--Level line is automatically created

David_Robison — Tue, 23 Feb 2016 16:38:16 GMT

Jeremy--thanks for the reply. That works as a solution for me. I'll figure out how to get a level included in the IFC file. It sounds like that should allow my IFC file to play better with Revit.

Re: IFC Import--Level line is automatically created

jeremytammik — Tue, 23 Feb 2016 16:47:39 GMT

Dear David,

Thank you for confirming!

Yes, it certainly does.

I passed on the good news to the development team.

Cheers,

Jeremy

Re: IFC Import--Level line is automatically created

jeremytammik — Wed, 24 Feb 2016 11:08:47 GMT

I published a summary of this discussion here:

http://thebuildingcoder.typepad.com/blog/2016/02/ifc-import-levels-and-mep-element-shapes.html#2

Re: IFC Import--Level line is automatically created

David_Robison — Tue, 15 Mar 2016 14:42:04 GMT

Follow up question...how do you actually go about making this work? I had a moment to give this a try and did not have any luck.

Attached is an IFC file I created from Revit. When I link it back into Revit, the level line shows up in the elevations.

Re: IFC Import--Level line is automatically created

jeremytammik — Tue, 26 Apr 2016 09:36:42 GMT

Dear David,

Thank you for your update and sorry I missed it!

For all others interested: David raised a new thread to continue this discussion:

http://forums.autodesk.com/t5/revit-api/creating-an-ifc-with-a-level-1-included/m-p/6291934

Thank you for that, David!

Let's continue this there, then.

Cheers,

Jeremy