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Forums >> Revit Building >> Technical Support >> Create Roof Family Object
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Joined: Tue, Oct 19, 2004
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I've been trying ot make a roof family component stick to the roof, but for some odd reason, it offsets the object from the roof.
I've applied dimensions to keep the object in place but oddly on roofs that are round, the object gets placed out of position. I know this because I view it in 3d...
Looks good from plan view, but from a 3d shot it's actually above the roof.
Are there any tutorials that show how to deal with these type of issues?
Or if I'm doing something wrong, please advise of alternate experience you may have had.
Thank you.
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Joined: Mon, Jan 12, 2004
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How has the roof object been created?
The ideal solution would've been to create it non-hosted, then load into hosted family and lock to the wall face using the nested objects origin and linking the parameters. You are less likely to have issues like this if its created in this manner.
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Joined: Tue, Oct 19, 2004
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"How has the roof object been created?"
As I mentioned, as a roof component...
The ideal solution would've been to create it non-hosted, then load into hosted family and lock to the wall face using the nested objects origin and linking the parameters. You are less likely to have issues like this if its created in this manner.
Non hosted?
How would it attached itself to the roof and cut an opening?
Let me explain what I've been doing...
I'm creating a roof drain that opens the roof and inserts the drain component, how as a non hosted component would this work? Still learning....thank you.
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Joined: Mon, Jan 12, 2004
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By creating the solid geometry non-hosted to begin with it makes the element easier to control and constrain to the roof to avoid the issues your having.
Then in the hosted family, you'd just need to include the void or opening to cut the roof. By constraining the element this way it will behave better for different thickness roofs.
If you open your family currently and adjust the roof thickness you'll find you'll get errors which is why it sits above your roof in the project.
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Could you walk me through the actual creation?
I'm assuming that I would just create the model of the roof drain, but how would I define the void in the roof?, and how would I actually attach the object to the roof? or does it just adjust itself?
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Joined: Mon, Jan 12, 2004
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Okay assuming that you have created the roof drain non-hosted and now wish to nest it into the hosted family...
In your roof drain family you would need to ensure the origin of the family is in a appropriate position (for instance where the top surface of the roof maybe...) so we can constrain to this point. You can control the origin my selecting reference planes and choosing defines origin. 3 reference planes together define the actual origin point.
Load the family into a new roof hosted template.
Add reference planes/parameters etc to control size.
Create your void and constrain to reference planes as appropriate (if its going all the way through use an opening instead).
Use the cut geometry tool to tell the void to cut the roof.
Now place your component.
Align and lock its origin in elevation to the top surface of the roof, or the appropriate position.
Constrain it in the other two dimensions.
Link any adjustable parameters from the roof drain family to this new family. Do this by going to its properties and hitting the button next to each dimension and adding parameters as appropriate. (refer to revit help if you're unsure how to do this)
Flex the family (adjust parameters, including roof thickness) to ensure there are now errors.
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Thanks, I'll give it a try and tell you what happens...
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