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Re: Managing Autocad Linked Details
We've created a pretty good system of maintaining a single detail library that can be used in both AutoCAD and Revit.
Our goal was to be able to edit the details in both ACAD and Revit w/ out errors or performace/File Size issues.
The trick is to Revitize the cad drawings really well using a serious of steps.
Note: our cad details are not big, biggest is about 200kb.
For 2D drawings some of these steps are:
-Aecobjexplode (we use ACAD MEP, not sure if this will work for vanilla, you can also try -EXPORTTOAUTOCAD)
-Change Qleaders to Mleaders
-Change all mtext/text to Arial font and then explode to maintain formatting.
-Use Window's Charmap to replace symbols that won't import.
-Make sure there are no lines, circles, hatches whos length or area is smaller tha 1/32" as Revit won't create them.
-Explode any non-solid hatch patterns and make sure they are not too dense.
-Make everything ByLayer.
-Purge including RegApp items.
-Drafting View scale must match cad drawings scale.
Some things that won't transfer:
-Pline thickness won't transfer.
-Linetypes that use shapefonts won't transfer.
-Test Mask won't transfer.
-Mtext line spacing and tab spacing won't transfer.
Some things that will transfer:
-Degree symbol %%D will transfer.
-FIELDS will transfer.
-Splines will transfer.
-Mtext bullets will transfer.
-Mtext width factor will transfer.
-Dimensions will transfer as exploded elements.
-Tables will transfer.
-Attributes will transfer.
For 3D CAD Drawings we use a different approach that uses the Convertto3Dsolids command in an isomentric view and importing that to a generic model family.
This allows for proper View Range and Section Cut representation.
We create a command in ACAD that automates a lot of these steps including checking for elements that are smaller that 1/32".
You can then create a Revit project file that's been purged. Link a cad detail per drafting view and built your library from there.
Linking is key when building your library as this keeps your Revit Details up to date w/ your Cad Details.
Once you have your library built, you can use the Insert View from File --> select your library file --> select a detail you want to import.
If the cad drawing has been revitized correctly, you can then explode in Revit if you want and make changes to it as needed.
No this will not affect performance or file size if you followed the steps outlined above.
We use ACAD MEP, but when cleaning the drawings we use Vanilla ACAD as this makes the file size smaller.
Miguel Valencia, LEED® AP BD+C
Syska Hennessy Group, Inc.