Constraining Dimensions

Dimensions are a very powerful way in Revit to control your model. But did you know that they can have control over your model even if they have been deleted.

In this example we have a section of Curtain Wall where I want the Door to be locked at 1000mm and then the glazing to be split up equally for the rest of the length. I am just going to create 2 strings of dimensions as shown. (Note, the 1000mm dimension is locked to keep it constant, do not lock the EQ dimensions)

These dimensions will now control the model. I can delete the dimensions and you will get this warning message. Which is telling me that the dimensions although deleted will still control the model. Hit OK.

This means that I can stretch the Curtain Wall and the divisions will alter as previously locked, without adjusting the door width. 

This process works with any Revit Elements, not just a Curtain Wall layout.