Tony | Measuring wall surfaces net of openings automatically in PriMus IFCTony 2020-09-23 15:49:36 How can I generate a measurement line that detects the the selected wall surfaces net of the contained openings? Answer You can achieve this sort of measurement data when the IFC model, among the various other metric information, also proposes the "surface area net of openings". In this case, in fact, in the measurement row data all you need to do is add the variable: $BaseQuantities.NetSideArea$ to automatically retrieve the wall surface measurements net of any contained openings. Related discussions: -> How do I to take into account the measurements for doors or windows and subtracting from surfaces and volumes |