IFC to revit export: Renovation Filter issues

[afreytag]

Our Architecture firm is having issues with consultanting engineer's ability to read renovation filters in revit.

We are designing a new addition going to tie into an existing building. Within the revit software it's identifying all demolition filter objects as new work, you can think of Revit only having two phases Existing and New Construction. Elements that are being demoed for instance would be created in the (Existing) phase and demolished in the (New Work) phase. A new item would be created in the (New Work) phase and then Revit has filters to determine what shows up where in view. Does anyone have a a solution for translating IFC files with the appropriate renovation filters

Location:USA

[mattmgut]

Hi afreytag.  I am having the same issue.  Did you find a solution?

Matthew

[afreytag]

Matthew,

We did not find an easy solution.. Our work around has been sending IFC files one with new work and one with demolition. Graphisoft offered to perform an audit to identify issues, however we determined the price they are asking to find a solution isn't acceptable given the amount we pay for the yearly licenses and are continuing to find our own solution. We have not come up with an easy solution.

Adam

[mattmgut]

Thanks Adam.  That is what I was going to do next.  Too bad it is not more straight forward.  

Side question:  Do you always export as IFC as opposed to a direct Revit file?

[Brandon-W_DWa]

Replying to keep this alive, as there are still issues. Our biggest problem with the Archicad > IFC > Revit workflow is also renovation phasing. Doors in particular cause the most headaches. Below are some of the high-level things we've learned from our engineers in Revit:

• Linking an IFC into Revit (via "IFC Model Exchange with Archicad for Revit" plugin) results in a linkable IFC, but renovation filters don't translate nicely, similar to the issue in your original post. Importing an IFC into Revit (via "Improved IFC Import" from the "IFC Model Exchange with Archicad for Revit" plugin) results in about 95% correct phasing scope in Revit (with doors being the largest amount of model geometry that isn't correctly phased), however with the loss of the ability to relink a new IFC at the next model share date. This is a tough decision for our addition/renovation projects. I've posted about this in both AC and Revit forums, to no avail.
• We eventually got to the point where we had to send a handful of basic IFC exports to our engineers in Revit (four walls, a roof, a door, on various renovation phases) with one setting modified in each export, effectively to find the right combo of IFC export settings that played nice in Revit. Our most recent successful test entailed "setting "Export IFC Properties" to "All IFC Properties", within the Data Conversion Settings of our template translator." My engineer reported that this setting enabled the phasing property to be sent along with the IFC.