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Revit Link - Link model from RAC to RST

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    Revit Link - Link model from RAC to RST

    Hi guys,

    I've received a RAC file from the Architect and am having a go at linking it and then doing a copy/monitor on it so that we can create our model in RST.

    I'm a little unsure on how exactly I should use it. It this basically a 3D Xref that I now trace over to create a new model? If this is the case how can I query components in the RAC file to find out more info about them. At the moment they are like a locked group.

    Is it possible to simply copy the structural components over from the RAC file and start using them in my model? It seems a little silly to me that I need to completely re-create all the work the Architect has already done.

    If someone could please explain the best workflow that would be a huge help. Thanks heaps.

    #2
    Originally posted by JasonWallis View Post
    Hi guys,

    I've received a RAC file from the Architect and am having a go at linking it and then doing a copy/monitor on it so that we can create our model in RST.

    I'm a little unsure on how exactly I should use it. It this basically a 3D Xref that I now trace over to create a new model? If this is the case how can I query components in the RAC file to find out more info about them. At the moment they are like a locked group.

    Is it possible to simply copy the structural components over from the RAC file and start using them in my model? It seems a little silly to me that I need to completely re-create all the work the Architect has already done.

    If someone could please explain the best workflow that would be a huge help. Thanks heaps.
    We link RAC models all the time!

    If you're starting a project from scratch:
    We start with a new project, using our own RST template.
    Insert Tab > Link Panel > Link Revit ... you may have gotten this far already. You'll probably want to check Positioning: Typically, I use <Auto - Origin to Origin.> If you've had a BIM coordination meeting with your civil guys included, you may want to use <Auto - By Shared Coordinates.> Then click <Open.> Once the RAC model is in, click it to highlight, then on the Modify|RVT Links Tab, Modify Panel, choose the Pin tool (looks like a pushpin.) This will lock the RAC model in place so it doesn't mistakenly get moved. It can still get deleted, but it keeps the RAC model in place.

    Next up: Levels and Grids.
    If the Architects have set grids (sometimes they want us to do it, but have given rough, architecturally-temporary column locations) we'll go into Collaborate Tab > Coordinate Panel > Copy/Monitor > Select Link. You've probably already read up on how to Copy/Monitor so I won't go into all that. We choose all the Architectural Grids and Copy (and Monitor) them into our Structural Project. We've found that we like to have our own set of grids, still monitored to the Architectural grids, so that we can manipulate the bubble ends where we need them in our structural documentation.

    Then I'll go to an Elevation View and Copy/Monitor the levels. I'll also add a level for TOF.

    I don't Copy/Monitor anything else. If I need to see bearing walls, I communicate to the Architects which walls they need to set to Bearing. I'm not concerned with interior partition walls if they're not carrying structure, so I don't want to see them.

    Floors... In our firm, we've decided to keep two floors; Architects keep one, set edge of slabs, show their floor depressions, etc, and we keep one that we use in analysis, coordinating edge of slab and floor openings with the architects. Once coordinated, I turn off the Architect's floor in my views. Setting that up in my View Templates makes it easier to do that for all my views.

    Columns... even if the architects have shown columns in their RAC model, I insert my own. They're structural elements; we need them for analysis; their size, during design, is flexible; we need to have them live in our structural model for scheduling. So, ~if~ the architects showed them in their model, they know that once the structural model is attached, they'll be deleting theirs.

    ~~~ We have a little different workflow if my engineers have started a model in their analysis program and we need to start with that... Another post for another day.

    To query Architectural items, your <TAB> key is going to be your best friend. Hover your mouse over an architectural item, hit your tab key a few times until the item you want to query is highlighted. Then left-click. You can see the item's properties in your properties box (greyed out because you can't edit it, but still visible so you can investigate.)
    Last edited by LeanneZ; December 15, 2011, 01:05 PM.
    Leanne Zaras, CDT, LEED AP
    AutoCAD 2010 Certified Professional / Revit Architecture 2012 Certified Professional / Revit Structure 2015 Certified Professional
    ACAD2021, RST2014-2021 / Windows 10, 64-bit

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      #3
      I agree with Leanne, except with the walls. We put in our own walls over the architects because of beams bearing on them and their setbacks. Other than that, awesome post!
      Adam Hutchinson
      Engineer in Training
      Integrus Architecture, P.S.

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        #4
        Thanks for the tips guys, I can see that like LeanneZ said the 'tab' key is going to be my best friend.

        I am wondering why I have to completely re-create the Arch model, why can't I just make a copy of it, rename it to what I want and then copy/monitor it back to the original Arch model? That way I could go through and simple change the properties of the existing structural elements to what we want them to be?

        Is it because we would have the Arch model templates and not our own? Is re-creating the lesser of the two evils?

        Thanks.

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          #5
          Originally posted by JasonWallis View Post
          Thanks for the tips guys, I can see that like LeanneZ said the 'tab' key is going to be my best friend.

          I am wondering why I have to completely re-create the Arch model, why can't I just make a copy of it, rename it to what I want and then copy/monitor it back to the original Arch model? That way I could go through and simple change the properties of the existing structural elements to what we want them to be?

          Is it because we would have the Arch model templates and not our own? Is re-creating the lesser of the two evils?

          Thanks.
          Jason, I did this once. And ONLY once.

          Even if the architect uses "structural" families you will run into a boat load of issues if you follow the route of just renaming their file. We tried this once on a 'fast-track' project. When we went to edit the beams the ends shot out of the building 40-50 ft. Changing types caused some to disappear. I don't remember if they had access to the beam system tool or not but they used grouped arrays instead, another mess.

          Point is, the copy monitor works really well for levels and grids, ok for columns. Floors and walls, IMO, are only useful to get the initial elements in. After that the coordination is too much of a pain and the tools aren't really developed fully to work correctly. In fact, I avoid using the slabs and walls in copy monitor if I can avoid it.

          Hope that helps,
          Tom
          Tom Whitehead
          BIM Herder & Revit Wrangler
          Portland, OR

          Comment


            #6
            Originally posted by LeanneZ View Post

            ~~~ We have a little different workflow if my engineers have started a model in their analysis program and we need to start with that... Another post for another day.
            I would love to hear the other workflow.
            Revit Architecture 2013 Certified Professional

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