A ramp comprises a single inclined segment, or several inclined segments that are connected by a horizontal segment, refered to as a landing. A ramp flight is the single inclined segment and part of the ramp construction. In case of single flight ramps, the ramp flight and the ramp are identical.
NOTE A single flight ramp is represented by an IfcRamp instance without using aggregation and by utilizing the product shape representation directly at IfcRamp.
An IfcRampFlight is an aggregated part of an IfcRamp realized through the IfcRelAggregates relationship, the ramp flight is therefore included in the set of IfcRelAggregates.RelatedObjects.
An IfcRampFlight connects the floor slab of zero to two different storeys
(or partial storeys or landings) within a building. The connection relationship between the IfcRampFlight and the IfcSlab is expressed using the IfcRelConnectsElements relationship.
HISTORY New entity in IFC2.0.
Common Use Definitions
The following concepts are inherited at supertypes:
- IfcRoot: Identity, Revision Control
- IfcElement: Product Placement, Box Geometry, Body SurfaceOrSolidModel Geometry, Body SurfaceModel Geometry, Body Tessellation Geometry, Body Brep Geometry, Body AdvancedBrep Geometry, Body CSG Geometry, Mapped Geometry
- IfcBuildingElement: Product Assignment, Surface 3D Geometry
The Object Typing concept applies to this entity as shown in Table 150.
Table 150 — IfcRampFlight Object Typing
Property Sets for Objects
The Property Sets for Objects concept applies to this entity as shown in Table 151.
Table 151 — IfcRampFlight Property Sets for Objects
The Quantity Sets concept applies to this entity as shown in Table 152.
Table 152 — IfcRampFlight Quantity Sets
The Material Single concept applies to this entity.
The material of the IfcRampFlight is defined by the
IfcMaterial and attached by the
IfcRelAssociatesMaterial.RelatingMaterial. It is
accessible by the inverse HasAssociations relationship.
The Spatial Containment concept applies to this entity as shown in Table 153.
|IfcBuildingStorey||Default spatial container, if the ramp flight is not used (by default) as a part within a ramp container.|
|IfcBuilding||Spatial container for the element if it cannot be assigned to a building storey|
|IfcSite||Spatial container for the element in case that it is placed on site (outside of building)|
Table 153 — IfcRampFlight Spatial Containment
The IfcRampFlight, as any subtype of IfcBuildingElement,
may participate alternatively in one of the two different containment relationships:
- the Spatial Containment (defined here), or
- the Element Composition.
NOTE Model view definitions or implementer agreements may force an IfcRampFlight to be solely used as a part within an IfcRamp container. In this case, no Spatial containment shall be used.
Axis 2D Geometry
The Axis 2D Geometry concept applies to this entity.
The walking line is represented by a two-dimensional open curve
as the axis. The curve is directed into the upward direction
(direction has to be interpreted as specified at the subtypes of
Figure 201 illustrates the axis representation which has the following constraints:
- In case of straight flights the curve shall be a single item of type IfcPolyline.
- In case of winding flights the curve shall be a single item of type IfcCompositeCurve.
- In case of a curved flight or a spiral flight the curve shall be a single item of type IfcTrimmedCurve.
Figure 201 — Ramp flight axis
The FootPrint Geometry concept applies to this entity as shown in Table 154.
|FootPrint||GeometricCurveSet|| ||Any collection of points and curves representing the floor plan projection.|
|FootPrint||Annotation2D|| ||Any collection of points and curves, and additional hatching and text representing the floor plan projection.|
Table 154 — IfcRampFlight FootPrint Geometry
The flight foot print, including the flight boundary is represented by a two-dimensional geometric curve set.
Figure 202 illustrates the footprint representation which has the following constraints:
- In case of straight flights the curve set shall consist of a single item of type IfcPolyline.
- In case of winding flights or curved flights the curve set shall consists of a single item of type
- In case of a spiral flight the curve set shall consists of a single item of type IfcConic or
Figure 202 — Ramp flight footprint
Body SweptSolid Geometry
The Body SweptSolid Geometry concept applies to this entity.
The following additional constraints apply to the 'SweptSolid'
Figure 203 illustrates the body representation.
Figure 203 — Ramp flight body
Body Clipping Geometry
The Body Clipping Geometry concept applies to this entity.
XSD Specification: <xs:element name="IfcRampFlight" type="ifc:IfcRampFlight" substitutionGroup="ifc:IfcBuildingElement" nillable="true"/>
<xs:attribute name="PredefinedType" type="ifc:IfcRampFlightTypeEnum" use="optional"/>
|CorrectPredefinedType|| : ||NOT(EXISTS(PredefinedType)) OR
(PredefinedType <> IfcRampFlightTypeEnum.USERDEFINED) OR
((PredefinedType = IfcRampFlightTypeEnum.USERDEFINED) AND EXISTS (SELF\IfcObject.ObjectType));|
|CorrectTypeAssigned|| : ||(SIZEOF(IsTypedBy) = 0) OR
('IFCSHAREDBLDGELEMENTS.IFCRAMPFLIGHTTYPE' IN TYPEOF(SELF\IfcObject.IsTypedBy.RelatingType));|
|PredefinedType|| : ||
Predefined generic type for a ramp flight that is specified in an enumeration. There may be a property set given specificly for the predefined types.
NOTE The PredefinedType shall only be used, if no IfcRampFlightType is assigned, providing its own IfcRampFlightType.PredefinedType.
IFC4 CHANGE The attribute has been added at the end of the entity definition.
|CorrectPredefinedType|| : ||
Either the PredefinedType attribute is unset (e.g. because an IfcRampFlightType is associated), or the inherited attribute ObjectType shall be provided, if the PredefinedType is set to USERDEFINED.
|CorrectTypeAssigned|| : ||
Either there is no ramp flight type object associated, i.e. the IsTypedBy inverse relationship is not provided, or the associated type object has to be of type IfcRampFlightType.
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