Help with Component

[ToanDN]

I am creating some basic casework components for our project and I am running into some road block.  Basically I need the casework tag to change its mark automatically when the width of the casework changes.  For example, I have casework ranging from 15" to 4' with 3" increment.  15" casework is tagged as C1, 18" = C2, and so on.  That I can do by assigning a specific width parameter to a specific type.  The problem is with non-standard size casework.  I want all non-standard sizes to be C0. Is there anyway on Revit to achieve this.  I am thinking of some conditional formula (if size does not match standards then), but I don't know exactly where to start.  Another way is to create another component with dynamic width just for non-standard sizes.  But if for some reason a non-standard size got stretch to a standard size then it can be miss tagged.

Thanks.

[ToanDN]

Anyone? I just want to know if it even possible. If not then I will stop wasting time and find for some alternatives. Since this is a very easy to do with AutoCAD's dynamic block I thought it would be a piece of cake in a true parametric program like Revit. Am I wrong?

[kathryn.langan · Accepted solution]

You could create a new Type Mark Family Parameter of your own that contains a conditional formula for this. You can use an Embedded IF statement, something like

 =IF ( Width = 1'3", "C1", IF ( Width = 1', "C2", "C0" ) )

which would return C1 if it's a 15" width, C2 if it's 12", and C0 if it's neither. If you're not sure where to start on statements, you can take a look at the Conditional Statements in Formulas document of the help menu, which shows examples of IF statements with text parameters and embedded statements.

I hope this helps!

[ToanDN]

That is exactly what I need. Thanks for pointing me to the right direction.

[kathryn.langan]

No problem - glad to help!

[ToanDN]

Another related question. Can I add conditional formula in a Basic Wall's parameter? For example, a wall has STC = 40, 45, or 50. The wall tag is designated A, B, or C respectively. For now I have the STC and the Designation as 2 parameters that need to be entered manually. I tried the suggested conditional formula for the Designation parameter but it doesn't seem to work. Any idea?

[kathryn.langan]

Since a wall is a system family, you can only add a shared parameter to it - which unfortunately cannot contain a formula. There is an existing request item to allow calculations to shared parameters under consideration for the future. If you would like to provide input and a business case on the importance of the item to your firm, I would suggest doing so at our Feedback site.

[ToanDN]

OK.  I hope you can help me on another request.  How can I include conditions from different parameters in the formula?  For example, in plain term: IF parameter Width = 3' AND parameter Overriden = NO THEN Result = A, otherwise Result = B. (Override is a YES/NO parameter)

I read up the link you gave me and can understand most of it except for the IF with Yes/No condition.

Thanks.

[kathryn.langan]

In this situation you could use:

IF (AND (Width = 3', Override), "A", "B")

The Yes/No parameter setting may not be as intuitive, but just including the parameter name assumes it to be a Yes.

Hope this helps!