android tv

Can you change built-in parameters from Type to Instance based, and vice versa?  This post shows you can. 

The essence of the workflow is to

• start a family with the desired template, 
• add a value to the parameter, 
• change the Family Category to something that doesn't have that parameter built-in, 
• switch the parameter to Instance, 
• then change the Family Category back to the original

Read the more detailed version here:
http://aectechtalk.wordpress.com/2013/12/26/change-revit-voltage-parameter-from-type-to-instance/

(It is based on changing voltage parameter to Instance based for Electrical Equipment)

Another nice workaround by Philip Chan - if you want to change one of Revit's built-in Type Parameters (derived from a Family Template, such as Door Fire Rating) to an Instance Parameter, you just have to take the Family on a little round trip to a more flexible Family Category.

For example:

1. New Door based on Door Family Template
2. Switch to Generic Model Type
3. Change built-in Type Parameter for Fire Rating to Instance
4. Switch back to Door Category

You can read Philip's whole post at:
Phil-osophy in BIM: Hacking System Parameters in Door Family