Pset_ImprovedGroundCommon Common properties for improved ground. IfcImprovedGround IfcImprovedGround TreatmentHoleCount Number of boreholes used for treatment. AvgTreatmentDepth Average depth of boreholes used for treatment. AvgTreatmentSpacing Average spacing of boreholes used for treatment. AvgDepthToTreatment Average depth to treatment. AvgTreatmentThickness Average treatment thickness.