Pset_TrackElementOccurrenceSleeper Properties common to the definition to all occurrences of IfcTrackElement with PredefinedType set to SLEEPER. IfcTrackElement/SLEEPER IfcTrackElement/SLEEPER HasSpecialEquipment Indicates whether the sleeper has any special equipment for fastening components (e.g. Balise, signum magnet) or not. SequenceInTrackPanel Sequence of the sleeper within the track panel. UnderSleeperPadStiffness Indicates the stiffness of the under-sleeper pad as design reference for the sleeper. MEDIUM SOFT STIFF OTHER NOTKNOWN UNSET MEDIUM Medium SOFT Soft STIFF Stiff OTHER required category not on scale (other) Value is not listed. NOTKNOWN Value is unkown (unknown) Value is unknown. UNSET Value has not been specified (unset) Value has not been specified. IsContaminatedSleeper Indicates whether the sleeper is contaminated and requires special disposal or not.