Four Methods for Inserting CAD into Revit Models
When collaborating in Revit, there are mainly three approaches: linking, collaboration, or using both simultaneously. Because linking resembles AutoCAD’s external reference coordination mode, it was the earliest and easiest method for most users to adopt. Below, we’ll explain how to effectively use the linking method to achieve efficient collaboration in Revit.
The key points to consider when coordinating via linking are:
- Inserting multiple Revit models: Four ways to manage linked files and use the eTransmit plugin
- Fundamental concepts of location and coordinates
- Obtaining, publishing coordinates, and elevation data
- Comprehensive application of shared coordinates in real projects
Below are four methods for inserting multiple Revit models, as well as tips on managing linked files with the eTransmit plugin.
Inserting 2D CAD Files
If the DWG file is a typical 2D drawing, you can bring it into Revit by either linking or importing the CAD file.
Method 1: Linking CAD
Linking keeps the CAD file associated with the original DWG. After modifying the CAD externally, simply open the Manage Links dialog in Revit and reload the corresponding CAD file. Note that this association is passive—Revit won’t automatically reload changes unless you manually select to reload the link.
Method 2: Importing CAD
Importing breaks the association between Revit and the original CAD file. Any changes made to the CAD file afterward will not update in Revit. To refresh updates, you must delete and re-import the CAD. Also, imported CAD files do not appear in the Manage Links dialog. This method is best suited for importing finalized CAD content into Revit. A quick way to import CAD is by dragging DWG files directly from a folder into the Revit window.
Inserting 3D CAD Files (e.g., exports from Plant3D or Civil 3D)
To load 3D CAD geometry into Revit, you can define it as a Revit family or mass manually, or use the DWG Sync for Revit plugin.
Method 3: Define Revit Family or Mass
Defining CAD models as Revit families allows you to assign them to specific categories. These categories control how the models are cut and displayed in plans and elevations. By setting a 3D CAD model as a Generic Family and loading it into Revit, the automatically generated plans will include the 3D DWG graphics. You also have control over how the cutting and projection planes are filled based on the Revit category.
Method 4: Use the DWG Sync for Revit Plugin
Manually loading 3D CAD can be cumbersome. Autodesk Labs offers a free beta plugin called DWG Sync for Revit, which automates this process. You can download it from __AI_ST_URL_0__.
This plugin performs DWG import steps with a single click. If there’s an updated CAD file, simply use the DWG Sync command to refresh the 3D DWG data in Revit. This method is especially useful for multi-disciplinary projects involving Revit, Civil 3D, and Plant 3D models.
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