Curtain Wall Profile Edges

[Yna_Db]

See what’s in this conversation maybe:

Area Boundary Lines on center line (curtain) walls

Element.Location for curtainwalls will return the location line which is as intended. If you want the geometric centerline you will need to get either the panels or the mullions (this will be two very different lengths) and offset the location line by 1/2 of the offset to the panels or mullions + 1/2 of the thickness of the panels or mullions.