Qto_ConstructionMaterialResourceBaseQuantities Base quantities that are common to the definition of all occurrences of construction material resources. IfcConstructionMaterialResource IfcConstructionMaterialResource GrossVolume Total gross volume of the material, including material placed and wasted. Q_VOLUME Gross Volume NetVolume Total net volume of the material, including material placed but excluding material wasted. Q_VOLUME Net Volume GrossWeight Total gross weight of the material, including material placed and wasted. Q_WEIGHT Gross Weight NetWeight Total net weight of the material, including material placed but excluding material wasted. Q_WEIGHT Net Weight