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:

 Instance diagram

Object Typing

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

Quantity Sets

The Quantity Sets concept applies to this entity as shown in Table 152.

Table 152 — IfcRampFlight Quantity Sets

Material Single

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.

Spatial Containment

The Spatial Containment concept applies to this entity as shown in Table 153.
IfcBuildingStoreyDefault spatial container, if the ramp flight is not used (by default) as a part within a ramp container.
IfcBuildingSpatial container for the element if it cannot be assigned to a building storey
IfcSiteSpatial 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:

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 IfcCurve).

Figure 201 illustrates the axis representation which has the following constraints:

walking line

Figure 201 — Ramp flight axis

FootPrint Geometry

The FootPrint Geometry concept applies to this entity as shown in Table 154.
FootPrintGeometricCurveSet Any collection of points and curves representing the floor plan projection.
FootPrintAnnotation2D 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:


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' representation type:

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:complexType name="IfcRampFlight">
   <xs:extension base="ifc:IfcBuildingElement">
    <xs:attribute name="PredefinedType" type="ifc:IfcRampFlightTypeEnum" use="optional"/>

EXPRESS Specification:

ENTITY IfcRampFlight
SUBTYPE OF IfcBuildingElement;
PredefinedType : OPTIONAL IfcRampFlightTypeEnum;
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[1].RelatingType));

Link to EXPRESS-G diagram EXPRESS-G diagram

Attribute Definitions:

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.

Formal Propositions:

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.

Inheritance Graph:

ENTITY IfcRampFlight
GlobalId : IfcGloballyUniqueId;
OwnerHistory : OPTIONAL IfcOwnerHistory;
Name : OPTIONAL IfcLabel;
Description : OPTIONAL IfcText;
ENTITY IfcObjectDefinition
HasAssignments : SET OF IfcRelAssigns FOR RelatedObjects;
Nests : SET [0:1] OF IfcRelNests FOR RelatedObjects;
IsNestedBy : SET OF IfcRelNests FOR RelatingObject;
HasContext : SET [0:1] OF IfcRelDeclares FOR RelatedDefinitions;
IsDecomposedBy : SET OF IfcRelAggregates FOR RelatingObject;
Decomposes : SET [0:1] OF IfcRelAggregates FOR RelatedObjects;
HasAssociations : SET OF IfcRelAssociates FOR RelatedObjects;
ENTITY IfcObject
ObjectType : OPTIONAL IfcLabel;
IsDeclaredBy : SET [0:1] OF IfcRelDefinesByObject FOR RelatedObjects;
Declares : SET OF IfcRelDefinesByObject FOR RelatingObject;
IsTypedBy : SET [0:1] OF IfcRelDefinesByType FOR RelatedObjects;
IsDefinedBy : SET OF IfcRelDefinesByProperties FOR RelatedObjects;
ENTITY IfcProduct
ObjectPlacement : OPTIONAL IfcObjectPlacement;
Representation : OPTIONAL IfcProductRepresentation;
ReferencedBy : SET OF IfcRelAssignsToProduct FOR RelatingProduct;
ENTITY IfcElement
Tag : OPTIONAL IfcIdentifier;
FillsVoids : SET [0:1] OF IfcRelFillsElement FOR RelatedBuildingElement;
ConnectedTo : SET OF IfcRelConnectsElements FOR RelatingElement;
IsInterferedByElements : SET OF IfcRelInterferesElements FOR RelatedElement;
InterferesElements : SET OF IfcRelInterferesElements FOR RelatingElement;
HasProjections : SET OF IfcRelProjectsElement FOR RelatingElement;
ReferencedInStructures : SET OF IfcRelReferencedInSpatialStructure FOR RelatedElements;
HasOpenings : SET OF IfcRelVoidsElement FOR RelatingBuildingElement;
IsConnectionRealization : SET OF IfcRelConnectsWithRealizingElements FOR RealizingElements;
ProvidesBoundaries : SET OF IfcRelSpaceBoundary FOR RelatedBuildingElement;
ConnectedFrom : SET OF IfcRelConnectsElements FOR RelatedElement;
ContainedInStructure : SET [0:1] OF IfcRelContainedInSpatialStructure FOR RelatedElements;
ENTITY IfcBuildingElement
HasCoverings : SET OF IfcRelCoversBldgElements FOR RelatingBuildingElement;
ENTITY IfcRampFlight
PredefinedType : OPTIONAL IfcRampFlightTypeEnum;

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