Getting some instance family types’ perimeter

Revit
6

So is the structure a family? If so you have options.

  1. Build some model lines for the base perimeter shape in the family environment. Then use Element.Curves to pull those lines, and generate the surface by patching a polycurve build from the curves.

  2. Use the parameters of the family instance to create a rectangle which you patch, then use the family instance’s coordinate system to put the rectangle in place.

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