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If I have a property in a Revit Family Type Library that is a Family Type is there a way I can reference the type that is selected in the property for use in formulas.

Say for example I have a parameter "Bolt Washer (default)" parameter name and the value I have set in the Value field is "Washer : 50x50x3".

I would like to be able to have a value of a another parameter in the type that is changed based on the selected value in the Value field of the Bolt Washer parameter.

For example: 

IF (Bolt Washer = "50x50x3", 3, IF(Bolt Washer = "65x65x6", 6, 10))

Example of family property editor dialogue for the type

sweetfa
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2 Answers2

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A revit trick I use to get this functionality, is add a integer parameter to a Revit Family named typeIndex and give each type a unique ID and use this with nested if statements to change properties.

Something like this.

if(typeIndex = 1, 100 mm, if(typeIndex = 2, 200 mm, 300 mm))
Sander Obdeijn
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Unfortunately, there is no way to do what you'd like. Also, you can't reference text of a parameter either. For example you can't use a formula of: IF(Bolt Text='text',0,1)

You're best best is to make the Bolt Washer Thickness and Bolt Washer Type parameters.

Anthony Tiefenbach
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  • Thanks, I need them as instance parameters as the washer type can be different depending on the application of the same bolt type. – sweetfa Aug 13 '13 at 20:27