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Forums >> Revit Systems >> Technical Support >> Default Constraints in window family
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Joined: Mon, Jun 30, 2008
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When you are in the family you do not see or have control over some parameters that when you place into your project show up under "constraints" under Element Properties. Such as in my window I want to be able to use Head Height instead of Sill Height to define the location of the windows. I added a Head Height parameter in the family and deleted the sill height parameter. However when the window is loaded into a project there is still a Sill Height parameter that is the determining height of my window placement. How do I delete / over ride these default family parameters???
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You can add calculation that will manage it sill height + window height = Head height Add the calculation into sill height: head height - window height Work's for me
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Thanks for the reply I get how to do that but the "Sill Height" parameter is not in my family, it only shows up when I load the window into my project. Like its a default Revit setting for the window category as a whole. How do I get rid of or override this parameter that I cannot see in my window family just in my project?? It seems to be the parameter that is driving everything when I place a window. If I set this parameter to 0'-0" then my Head Height parameter works............ Blah
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The Sill Height and Head Height parameters are automatically added to the window family when it is loaded into the project. As far as I know, this cannot be disabled. The Head Height and Sill Height automatically behave as you want if the window is created properly as you can set either one and it will do the math by default.
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Hello all. Working in 2010. I saw this post and I am having a similar problem with this constraint except in a door family. Is there any way to set this within the family or can it only be done in the project? My problem is I created this door family with a 6'-8" door and when I go to create another type for an 8'-0" door the bottom reference plan goes below the ground floor. I have tried to lock the ref. plane to the ground floor and set a parameter for the header height but I get the overconstrain sketch error. What can I do to fix this? I have attached the family. Thank you for any help. Raina Mc
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Joined: Tue, May 16, 2006
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In the family, remove the door height label, alin and lock the planes then add the door height label back in. Also remove that 4' dimension - it is redundent.
Edited on: Tue, Aug 10, 2010 at 12:00:06 PM
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Thank you however it is not working. Here is the exact process I went through is there something I missed. 1. Deleted the door height parameter dimension. 2. Aligned and locked bottom reference plane to the ground floor level. 3. Replaced dimension from reference plane to refernece plane. 4. Picked dimension and added the parameter for height. Error Labeling this dimension would overconstrain the sketch. I also removed the 4' dimension but it was just there for my reference. Thank you again
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Sorry - I missed that 8'x dimension on the left. That too should have been deleted. I deleted that and flexed the family and it works. Be careful when you work in these families. If one dimension defines a location of a ref plane or element, don't add a dimension from the other side.
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Worked like a charm! Thank you!
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wwhub, you said in the family, remove the door height label. How do you get into modifying the family? Im trying to modify the default constraints for my walls because they are being built on the wrong layer. Is this the same technique?
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Max wrote "...Im trying to modify the default constraints for my walls because they are being built on the wrong layer. Is ..." I'm sorry but I don't understand this. Are you talking about layers as in CAD? Revit does not have CAD layers but it will export to CAD in layers. Walls in revit have "layers" but they are not drafting layers. They are "use" layers. The wall can have core, substrate, finish, thermal layers. So can you please reask your question in a different way?
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I know this is an old post but thought I'd add this for anyone who is still struggling with this issue. I built a custom window family, spending a lot of time to make sure all my parameters would 'flex' properly and it appeared that everything would work nicely until I loaded it into a project file. I had a similar problem as tinninttu where the sill and head heights under the 'Constraints' category would be off by 3", the exact amount that my sill flashing drops below the sill level established in my family. So when I went back into my family, I noticed that when you click on a reference plane, you can check a little box in the properties dialog that says "Defines Origin". By checking this option and reloading the family, my revit project was able to recognize that the sill started from that particular reference plane and not simply the bottom of geometry. Or in other words - once I set the sill reference plane in my family to define the origin, the family behaved correctly, allowing me to set the sill OR head height in the project and they would update accordingly.
Hope that helps anyone for the future.
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80375_FRONT_DOOR_WITH_SIDELIGHTS_TRANSOM_ABOVE.rfa