7.8.2.2 IfcRailwayPartTypeEnum
7.8.2.2.1 Semantic definition
The IfcRailwayPartTypeEnum defines the range of different types of railway part that can be specified.
The spatial structure of a railway is sub-divided into several elements for lateral, vertical and longitudinal decomposition:
- TRACKSTRUCTURE is for the track part of the railway (vertical decomposition).
- SUPERSTRUCTURE is for the upper part of the railway (vertical decomposition).
- LINESIDESTRUCTURE is for the lateral part of the railway (lateral decomposition).
The subpart of the railway is generally either a IfcFacilityPartCommonTypeEnum BELOWGROUND (non constructed ground) or SUBSTRUCTURE (constructed ground).
TRACKSTRUCTURE could have longitudinal decomposition based on track specificities:
- PLAINTRACKSUPESTRUCTURE for the plain line tracks (IfcElementAssemblyTypeEnum TRACKPANEL).
- DILATATIONSUPERSTRUCTURE for the area of dilatation panels (IfcElementAssemblyTypeEnum DILATATIONPANEL).
- TURNOUTSUPERSTRUCTURE for the area of turnouts (IfcElementAssemblyTypeEnum TURNOUTPANEL).
- TRACKSTRUCTUREPART for generic longitudinal decomposition if needed.
More generic longitudinal subdivision is provided for LINESIDESTRUCTURE with LINESIDESTRUCTUREPART value if needed.
7.8.2.2.2 Type values
| Type | Description |
|---|---|
DILATATIONSUPERSTRUCTURE
|
The dilatation superstructure is one specific type of the track structure. It does not contain any plain-track or turnout panel. |
LINESIDESTRUCTURE
|
A spatial structure element that contains the elements of the railway that are not in or over the tracks, hence line-side. |
LINESIDESTRUCTUREPART
|
A railway line side structure part is a longitudinal decomposition of railway lineside structure in more managable volume for engineering purposes. |
PLAINTRACKSUPERSTRUCTURE
|
The plain-track superstructure is one specific type of the track structure. It does not contain any turnout panel or dilatation panel. |
SUPERSTRUCTURE
|
A spatial structure element that contains elements that are positioned over the tracks, such as catenaries. |
TRACKSTRUCTURE
|
A spatial structure element that contains track-related elements. |
TRACKSTRUCTUREPART
|
A track structure part refers to a segment of a track system. It usually has one of the following functions: plain-track, turnout-track, dilatation-track. |
TURNOUTSUPERSTRUCTURE
|
The turnout superstructure is one specific type of the track structure. It does not contain any plain-track or dilatation panel. |
USERDEFINED
|
User-defined type |
NOTDEFINED
|
Undefined type. |
7.8.2.2.3 Formal representation
TYPE IfcRailwayPartTypeEnum = ENUMERATION OF
(DILATATIONSUPERSTRUCTURE
,LINESIDESTRUCTURE
,LINESIDESTRUCTUREPART
,PLAINTRACKSUPERSTRUCTURE
,SUPERSTRUCTURE
,TRACKSTRUCTURE
,TRACKSTRUCTUREPART
,TURNOUTSUPERSTRUCTURE
,USERDEFINED
,NOTDEFINED);
END_TYPE;