Forums >> Revit Building >> Technical Support >> top/base constraint as a parameter in family types

fredc83

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Joined: Thu, Jan 3, 2008
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I've created a pipe (for the drainage of water on the roof) as a family(just a simple solid extrusion with a void extrusion).I've added a paramter lenght as an instance parameter so i can change the length of the pipe. Now I want to make this family easier to use and add a parameter in the  family type so i can pick the top constraint off the pipe e.g. my roof level and the bottom constraint e.g. my ground level just like you can do with walls, which will be much easier than entering a value in the length parameter. Is this possible and does anyone know how? I'm using Revit Architecture 2009.

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fredc83

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Typhoon

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Joined: Tue, May 22, 2007
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Hi Fred, i'm not sure what are you trying to do, if you put some screen shots i think i can help you... what are you trying to do is "create" those "Blue Arrows" in top an bottom like in walls?

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I Hope and I Wish to LEARN  more, and more, and more.... REVIT

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fredc83

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First of all thanks for your reaction on my post.

In the attachment you see on the left side of the image the drainage I've created with his element properties, and on the right side a wall with his element properties. As you see in the element properties of the wall, there is a possibility to make a top and base constraint. This is what I want to add in the family I've created as an instance parameter. I think the blue handles you've mentioned in your post may stand for that base and top constraint. Hopefully you can give me a solution, it would make my family much easier to use.

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Typhoon

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Joined: Tue, May 22, 2007
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Hi, that "Base and Top Constrains" in the Wall is by default in the category, you can create in that plumbing family some ref. planes or ref. lines and with dimensions create some parameters to control what do you need, don't forget to "Lock" the obj. to the Ref. planes or lines.... by the way, if you do this you have those "Blue Arrows" to "stretch" your family....

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I Hope and I Wish to LEARN  more, and more, and more.... REVIT

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fredc83

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blueshift17

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Did you ever find a solution to this? I am in a very similar situation. Thanks

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Bronsart

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Joined: Tue, Oct 9, 2007
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Maybe a wishlist issue... but I also wish use base constraints (a level) and top constraints (a level) instead of having to use a height parameter (simular to a wall family).

You can do this, but you might need to remake your drain family.  What you'll have to do is make a "column" family instead of plumbing.  This will work as long as you are not scheduling your drain pipes.  The column family template as two levels, upper level & lower level.  See PDF...

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