Qto_PipeFittingBaseQuantities Base quantities that are common to the definition of all types and occurrences of pipe fittings. IfcPipeFitting IfcPipeFitting Length Length of the fitting, calculated at midpoint of cross-section and equal to the distance along the flow path from the port inlet to the port outlet. For junction fittings, it indicates the length of the longest flow path. Q_LENGTH Length GrossCrossSectionArea Area of the cross section at the inlet, including the pipe fitting itself and the interior flow space. Q_AREA Gross Cross Section Area NetCrossSectionArea Area of the cross section at the inlet, including the pipe fitting and excluding the interior flow space. Q_AREA Net Cross Section Area OuterSurfaceArea Total area of the extruded surfaces of the fitting (not taking into account the end cap areas). Q_AREA Outer Surface Area GrossWeight Weight of the pipe fitting itself, not including contained fluid. Q_WEIGHT Gross Weight NetWeight Weight of the pipe fitting, including contained fluid as designed. Q_WEIGHT Net Weight