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Forums >> Revit Building >> Technical Support >> Import issues and 3d
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Joined: Sat, Jan 21, 2006
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I import the .dwg floor plan into revit from Autocad and then explode it once. What can i do from that point on to make a 3d model. Extrude the walls? Ok but how can i do that? I mean how can i pick the walls and how can i define the walls in revit? I would really appreciate your help...
Post edited on 2006-01-21 09:00:15
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Importing and exploding an Autocad drawing is not the thing you want to be doing. It is best to only "link" the ACAD file in (like an xref in Revit). Make sure that when you are in the "import" dialog box that you check the "link" button.
Once linked in you can place walls in the Revit project by using the ACAD file as your guide. You can choose a wall type and trace over the ACAD linework, or you can use the Revit "pick" methodology. When in walls make sure you choose the pick icon (the one to the right of the pencil that looks like a Windows cursor).
HTH
Tom
www.reviteer.com (contains my links to Revit resources)
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A few other tips when tracing over linked DWG plan files;
When you first import / link the DWG to your Revit project, one of the import options allows you to specify which layers Revit should bring into the project: ALL, VISIBLE or SELECT. Choose only the layers you need at the time of import so you can minimize layer control in Revit.
The VIEW PROPERTIES of the view containing the DWG file contains the VISIBILITY button with a separate tab called "Imported Categories; i.e. your DWG file. You can control Layer visibility (ON/OFF), color, linetype etc in here.
When tracing over interior walls, select a wall family and set the justification to "Wall Centerline".
When your cursor hovers over the two AutoCAD line segments that represent a wall, Revit will find the centerline between the two lines....The "Wall Centerline".justification is the only wall justification that provides this pretty scary cool feature!
Remember that PLAN views usually have Model Graphics set to hidden line. When placing doors/windows into walls, consider setting the Model Graphics to Wireframe. You can now look down through the wall and see the jambs....which should more accurately help you view/place doors & windows.
As a linked file, it has some memory efficient characterics similar to AutoCAD XREFs; such as UNLOAD and RELOAD. See the "Manage Links" button on the File pulldown menu.
Last, in our Revit 7 class, the folks from Autodesk (not a dealer) indicated that exploding files should be done as a last resort and only with small files. They indicated that exploding DWG files with more than 10,000 entities may result in missing information. It sounded like 10k of entities was a "cap" at that time with Revit 7. Other Revit users have also indicated performance issues when they exploded large DWG files in Revit.
I have a blog post that will provide more info:
How can I use my AutoCAD or Microstation files in a Revit-based Project?
http://taylor-tech.com/blogs/getEntryById/54/entry.html
Cheers!
-----------------------------------
LinkedIn Profile:
- http://www.linkedin.com/in/danielhughes1/
I author Bradley BIM Blog: http://bradleybim.com |
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