1. Benjamin Guyon
  2. Collaboration - Open BIM
  3. Wednesday February 6 2019
  4. Follow by E-mail
Hello,

I am experiencing an IFC import issue under Revit:
I receive a file from Allplan for the structure, the rest of the project being modeled under Revit.

Problem: When I open the IFC on Revit, the hoppers are imported in generic models and do not cut the soil (does not create a vacuum)
Same for doors that are not imported.

In the IFC viewers the results are variable but work in general.

I did different tests via the mapping of IFC but without success.

Not knowing Allplan, would anyone have an idea to make an opening of IFC with Revit so that he recognizes the generic model as an opening of ground or wall?
Parameterization of Allplan?

thanks in advance
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you open your IFC, do not you?
you want to directly "edit" the IFC open and translated by Revit, and from AllPlan.

For me the results are still too precise for an IFC to be exploitable and modifiable since Revit.
(This is an exchange format, no work blablablab .. ;) )

After that, you have the opening parameters, or "important IFC options", to check that your IfcOpeningElement class is good.
By default, the category Revit is indeed "generic model", so yes, it makes sense until then.

With the default settings, an IFC exported from Revit and re-opened and translated by Revit indicates many editable openings in the floors and walls.

I guess it comes from the IFC AllPlan translator. If you have a piece of IFC AllPlan, I can do some tests.
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I open it, but linking it gives me the same result.

My mapping to Revit opens the IfcOpeningElement class in a generic model, but does not create the opening in the ground.

I lean for a problem Allplan / Revit, a use of IFC exclusively exchange purpose is therefore to consider.

Thank you for your answer
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Hello,

I have exactly the same problem but in the other direction.
export ifc from Revit -> import ifc on Allplan

3D volumes are imported, but reservations are missing.
I checked on viewers, and bookings are imported and through.

I am looking for a solution to this problem ..
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it is important to analyze the IFC before linking or importing it:
- open the IFC with a viewer and check the objects in question to see if they are in the right IFC Classes
Then you adapt your conversion table in Revit.

IFC is a file for communication between software, but it is important thatit is well regulated, both in export and in import
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Hello,

Maybe you will find a solution on the site https://bimstandards.fr/echanger-en-bim/fiches-echanges/

It presents methodological sheets of software exchanges via IFC.

Have a good day
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Regarding the BIMstandards exchange sheets, I have already looked and there are no (yet) cards for Allplan / Revit.
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Hello,

Indeed I had already looked on BIMStandards.

The concern for responding to Mikael is that the IfcOpeningElement class is translated by default into generic models without being interpreted by Revit as open.
In an IFC viewer the openings are in good class

I tried mapping to a cut of ground opening but without success.
And when at wall openings, only one IFC class needs to be converted to floor opening, or wall depending on the case.

Could the solution be to "sketch" the voids in the ground (if Allplan allows it ...)?
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What do you mean by "sketching"? I can do tests on Allplan if you're interested
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By sketch I refer to Revit's soil modeling mode of drawing its outline.
in the screenshots attached I created a slab with two hoppers by drawing them in the contours of the slab.
I freed myself from using the tools of floor openings,

I would be interested in a similar test on Allplan with an IFC export.

Thank you
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I have attached two identical files that are exported differently.
You can open both files on Revit to see the difference.
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Thank you, I just tested them, on both I have four openings including two by "OpeningElementsIfc"


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