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    Tracing a 3D CAD import in Revit?

    Hello everyone, first post to the forum here - so hope someone can help me out.

    In the most basic terms, my problem/question is how to translate 3D CAD(dwg) information to useful Revit elements.

    I've attached a screen capture of my issue. The red/green facets you can see are an import of a DWG exported from sketchup. They are a series of triangular facets forming a building skin.

    I have already discovered that DWG imports aren't much use in Revit as they can't be cut through etc. so what I am wanting to do is 'trace' these triangular facets. I am presuming the best method is the component model-in-place option, but happy to be told other wise!

    Once I've then traced these elements, so I have a series of triangular planes, they can be cut through and display properly in my sections.

    How do I do this?

    All help much appreciated.


    M

    Attached Files

    #2
    ..Am I allowed to bump?

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      #3
      I've never tried doing exactly what you are attempting but do know that you are able to import sketchup (.skp) files directly into revit. I can't recall ever exporting a .dwg from sketchup for use in revit but it seems to me that you may have better luck with importing the .skp file. So kind of a side note, I use sketchup for all client signage massing and import that into a revit family (face based). Here is the punchline, the biggest advantage I've found is that those signs can be resized via the scale (RE) command in revit. Try it with the .skp file and see if you get better results as I know that the massing will at least be maintained and will be able to be cut though. Make sure to SAVE AS sketchup version 4 as I believe that'll work without a hitch and just use the import CAD command in revit and pick the .skp extension.

      Comment


        #4
        Originally posted by kwandrew2 View Post
        I've never tried doing exactly what you are attempting but do know that you are able to import sketchup (.skp) files directly into revit. I can't recall ever exporting a .dwg from sketchup for use in revit but it seems to me that you may have better luck with importing the .skp file. So kind of a side note, I use sketchup for all client signage massing and import that into a revit family (face based). Here is the punchline, the biggest advantage I've found is that those signs can be resized via the scale (RE) command in revit. Try it with the .skp file and see if you get better results as I know that the massing will at least be maintained and will be able to be cut though. Make sure to SAVE AS sketchup version 4 as I believe that'll work without a hitch and just use the import CAD command in revit and pick the .skp extension.
        Putting it into a generic model family will allow it to cut in section. I would advise to LINK instead of import, actually I don't even recommend linking cad but sometimes we just have to deal with it.
        There are no stupid questions, only stupid people

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          #5
          Why don't you export IFC from sketchup and link(/ open converted file) in your Revit environment? Skp and dwg are both dead ends. Autodesk isn't very ambitious in good conversions. I use Automapki mesher to convert skp to dwg. Way better to work with dwg-wise..

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            #6
            As Elton suggested, bring the dwg into a cuttable family (generic) will give you the results you're looking for.

            You can't link into a family, you will have to import. So clean it up first in CAD (purge, preferably 1 layer).

            Depending where you are in the project (Schematic, DD or CD's) you might want to leave it in CAD for awhile. If you convert too early, then the design will change and you'll have to convert it again.

            If it's triangular faces, you should be able to replicate it in a mass environment.
            Chris Heinaranta | Architectural Technologist

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              #7
              Thanks for the replies everyone.

              I'm a bit of a revit novice, so bear with me. What would be the step by step for putting the DWG in the generic family?

              How do I then import this into my actual revit model?

              Many thanks.

              M

              Comment


                #8
                Originally posted by matt_ed View Post
                Thanks for the replies everyone.

                I'm a bit of a revit novice, so bear with me. What would be the step by step for putting the DWG in the generic family?

                How do I then import this into my actual revit model?

                Many thanks.

                M
                Simplistic Instructions:
                Start a new family from the Generic Model template. Insert tab, Import CAD. Browse to and select your CAD file. Positioning (usually) is Auto-Origin to Origin. Save as somewhere. Family Editor tab, select Load into Project (or and Close if you wish), select your project. In the project the family will now be listed under Generic Models in the Project Browser. Select it, right click, and select Create an Instance. Place it in your model. Make various views of your CAD GM including section views.
                I'm retired, if you don't like it, go around!

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                  #9
                  matt-ed, search for "youtube import .dwg into revit family" you will get multiple videos which address the exact question/process you are needing.

                  Comment


                    #10
                    Originally posted by Dave Jones View Post
                    Simplistic Instructions:
                    Start a new family from the Generic Model template. Insert tab, Import CAD. Browse to and select your CAD file. Positioning (usually) is Auto-Origin to Origin. Save as somewhere. Family Editor tab, select Load into Project (or and Close if you wish), select your project. In the project the family will now be listed under Generic Models in the Project Browser. Select it, right click, and select Create an Instance. Place it in your model. Make various views of your CAD GM including section views.
                    I followed Dave's instructions and it's worked perfectly. Not exactly the tracing I'd ideally wanted, but perfect for what I actually need to do. Many thanks.

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