Share Email Facebook Twitter LinkedIn Mullion.BreakMullion Method This method is used to break the current Mullion at ends with its neighboring mullions. Namespace: Autodesk.Revit.DBAssembly: RevitAPI (in RevitAPI.dll) Version: 26.4.0.0 (26.4.0.0) Syntax C# public void BreakMullion() Remarks The mullions being perpendicular to it will be joined accordingly. See AlsoReferenceMullion ClassAutodesk.Revit.DB Namespace