topic Re: Import of IFC from Revit in Collaboration with other software

Import of IFC from Revit

Anonymous — Sat, 05 Mar 2016 22:32:23 GMT

I'm having to work with a series of imported IFC's from Revit . They are about 35meg each and are appallingly slow in AC19. I'm quit unfamiliar with IFC's generated by others. Is there something I should tell them to do to their file before exporting?
Rob

Re: Import of IFC from Revit

Erika Epstein — Mon, 07 Mar 2016 14:40:10 GMT

Are you needing to edit them or just reference them?
If reference, in 2d and/or3d?

Re: Import of IFC from Revit

Anonymous — Mon, 07 Mar 2016 20:34:21 GMT

Hi Erica,
Mostly 3d work....soooo slow to orbit or zoom.

Re: Import of IFC from Revit

Anonymous — Tue, 08 Mar 2016 02:18:37 GMT

Robert,
Are you editing the imported IFC or just referencing it?
I have found that some Revit IFCs very heavy with polygons, in both 2D and 3D, Revit families are converted to library parts which are heavily triangulated and not at all optimised. I usually swap out converted parts with native ARCHICAD parts and this significantly improves performance

Scott

Re: Import of IFC from Revit

Anonymous — Tue, 08 Mar 2016 04:37:07 GMT

Hi Scott,
I think your right, on closer inspection they included all the loose furniture and other junk (hotel project) that I don't need, only working on the base building envelope...thanks.

Rob

Re: Import of IFC from Revit

Laszlo Nagy — Tue, 08 Mar 2016 16:20:25 GMT

You should ask the Revit guys to export to IFC only certain Categories or certain Families. Hopefully they can make such filtering of elements before saving as IFC. Then you could have IFC files that contain only the information you actually need.
Then you can make agreements with them to always send you IFC files in that specific way. It is a matter of working out the most optimal file exchange procedures.