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Forums >> Revit Building >> Technical Support >> Can we set our own constraints and if yes how?

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Sun, Sep 26, 2004 at 11:48:16 PM | Can we set our own constraints and if yes how?

#1

ale02


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Hi all, Just want to ask whether we can set our own customized constraints to our create-in-place family for example: certain metal roofing sheets, minimum pitch recommended by some manufacturers is 2 degree and some are 3 degree or more, after we create the roofing sheets families, can we set the constraints to the roofing sheets so that it will prompt error message when the roof pitch we work on in project for that particular roofing sheet we created is less than minimum pitch? Thanks first

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Mon, Sep 27, 2004 at 12:52:34 AM | RE: Can we set our own constraints and if yes how?

#2

Mr Spot


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Conditional formulas are possible in revit (ie: IF, NOT, etc). For instance i've previously setup integers so i can have two elements occupying the same space in a family however they can't both be visible at the same time. I suppose you could setup a greater than or equal to formula to DEFINE the angles, however you cannot CONSTRAIN the values and have it report an error. Personally i think it would be simpler to just add a text parameter in your family that lets you know the minimum pitch. My 2 cents. Post edited on 2004-09-27 00:54:38

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Mon, Sep 27, 2004 at 12:56:32 AM | RE: Can we set our own constraints and if yes how?

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Mr Spot


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There is a workaround for greater than and less than or equal to formulas as well. See below: IF - with "A" less then or equal to "B" - current work around IF ( NOT ( A > B ) , 8 , 3 )

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Wed, Mar 16, 2005 at 7:50:00 AM | RE: Can we set our own constraints and if yes how?

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Owjan


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Hi! Mr spot, can you show me how to setup integers so i can have two elements occupying the same space in a family however they can't both be visible at the same time? Regards Owjan

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