3D DWG to BIM Track

If you grew up in the 90s like us, you witness the rise of new technologies such as cable television,  World Wide Web for general public and the growing use of CAD.  Today, BIM is replacing CAD but moving away from CAD can involve many challenges. It can be a long process to implement BIM, and companies may still be working with 3D dwg as part of their coordination and fabrication process because it has been a successful solution. In that hybrid environment, CAD coexist with BIM. This is why this blog post goes through the basic steps of importing a 3D DWG in BIM Track using Revit. Purists, close your eyes.

So let’s take that 3D dwg file of different MEP systems in AutoCAD.

We are going to use Revit as a platform to convert this 3D DWG to an IFC (industry foundation classes) file. So first open up Revit, create a new family and select the generic model family template.

Import the 3D DWG in your family using the following options (be aware that we had some issue with the auto-detect feature under Import units so it is better to specify the unit manually).

Here is the imported DWG in the family.

Place the family and align it with the grid lines and make sure the shared coordinates are set as per the other models previously uploaded to BIM Track.

Export the model to IFC2x3 (see previous blog post here)

Import the IFC in BIM Track. The model should now appear as one big element. This is because the DWG format is not object oriented.

So I hope this « hack » to import non-BIM data like a 3D DWG in BIM Track can help you interface with other trades and provide sufficient information for understanding project scope context and help coordination.