Many times 3D families have 2D elements drafted in them. For example, door families have the swing drafted in in plan view as a symbolic line (arc). Many other examples apply.
However, there are some dangers in using nested 2D families within your 3D family: the nested 2D family must be a detail, and not an annotation! See the video below for an exhaustive example:
In Revit 2009, the property panel of a wall looks something like shown below.
The Instance parameter "Structural Usage" (in green) is available in wall schedules, and also it is very important in determining the visibility of the element in function of the instance View parameter "Discipline". This means that if you set your view discipline to "structural" only structural elements will be shown, and walls whose "Structural Usage" is NOT set to "Non-bearing".
The type parameter "Wall Function", on the other hand (in orange), is NOT available in wall schedules (nor view filters), and therefore the meaning of its existence becomes much more obscure to me.
Does anyone know why we cannot use this parameter, which becomes vital in defining Core&Shell Vs. Interiors, for example? I guess this is a question / wish list for the foundry...
About the Author
Giovanni Succi is a project designer living and working in San Francisco. He is a LEED AP, and for the last twenty years he has been researching the field of computer graphics, 3D modeling, rendering, and architectural design.
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