Qto_CableSegmentBaseQuantities Base quantities that are common to the definition of all occurrences of cable segment. IfcCableSegment IfcCableSegment GrossWeight Weight of the element. Q_WEIGHT Gross Weight Length Length of the segment, calculated at midpoint of cross-section, equal to the distance between inlet and outlet ports. Q_LENGTH Length CrossSectionArea Area of the cross section. Q_AREA Cross Section Area OuterSurfaceArea Total surface area of the cable. Q_AREA Outer Surface Area