IfcRampFlight

IfcRampFlight

Definition from IAI: Inclined slab segment, normally providing a human circulation link between two landings, floors or slabs at different elevations.

A ramp flight (IfcRampFlight) is normally aggregated by a ramp (IfcRamp) throught the IfcRelAggregates relationship, the ramp flight is then included in the set of IfcRelAggregates.RelatedObjects.

A ramp flight (IfcRampFlight) normally connects the floor slab of zero to two different storeys (or partial storeys) within a building. The connection relationship between the IfcRampFlight and the IfcSlab is expressed using the IfcRelConnectsElements relationship.

HISTORY New Entity in IFC Release 2.0
ISSUES: See issue and change log for changes made in IFC Release 2x.

Geometry Use Definitions:

The geometric representation of IfcRampFlight is given by the IfcProductDefinitionShape, allowing multiple geometric representation. Included are:

Local placement

The local placement for IfcRampFlight is defined in its supertype IfcProduct. It is defined by the IfcLocalPlacement, which defines the local coordinate system that is referenced by all geometric representations.

The PlacementRelTo relationship of IfcLocalPlacement shall point (if given) to the local placement of the same IfcSpatialStructureElement , which is used in the ContainedInStructure inverse attribute, or to a spatial structure element at a higher level, referenced by that.
If the IfcRampFlight, however, is used by an IfcRamp, and this container class defines its own local placement, than the PlacementRelTo relationship of IfcLocalPlacement shall point (if given) to the local placement of the aggregate.

Standard Geometric Representation

The standard geometric representation of IfcRampFlight is defined using the swept area geometry. The following constraints apply to the standard representation:

Solid: IfcExtrudedAreaSolid is required,
Profile: IfcRectangleProfileDef shall be supported.
Extrusion: The profile shall be extruded in any direction relative to the XY plane of the position coordinate system of the IfcExtrudedAreaSolid. Therefore non-perpendicular sweep operation has to be supported. It might be further constrained to be in the direction of the global z-axis in implementers agreements.

Example of geometric representation of IfcRampFlight.

EXPRESS specification:

ENTITY IfcRampFlight

SUBTYPE OF (

IfcBuildingElement);

END_ENTITY;

References (1):

Name

Type

Referred through

Express-G

IfcBuildingElement

Entity

Subtype

Diagram 1

Inheritance graph

ENTITY IfcRampFlight;

ENTITY IfcRoot;

GlobalId

IfcGloballyUniqueId;

OwnerHistory

IfcOwnerHistory;

Name

OPTIONAL IfcLabel;

Description

OPTIONAL IfcText;

ENTITY IfcObject;

ObjectType

OPTIONAL IfcLabel;

INVERSE

IsDefinedBy

SET OF IfcRelDefines FOR RelatedObjects;

HasAssociations

SET OF IfcRelAssociates FOR RelatedObjects;

HasAssignments

SET OF IfcRelAssigns FOR RelatedObjects;

Decomposes

SET OF IfcRelDecomposes FOR RelatedObjects;

IsDecomposedBy

SET [0:1] OF IfcRelDecomposes FOR RelatingObject;

ENTITY IfcProduct;

ObjectPlacement

OPTIONAL IfcObjectPlacement;

Representation

OPTIONAL IfcProductRepresentation;

INVERSE

ReferencedBy

SET OF IfcRelAssignsToProduct FOR RelatingProduct;

ENTITY IfcElement;

Tag

OPTIONAL IfcIdentifier;

INVERSE

ConnectedTo

SET OF IfcRelConnectsElements FOR RelatingElement;

ConnectedFrom

SET OF IfcRelConnectsElements FOR RelatedElement;

ContainedInStructure

SET [0:1] OF IfcRelContainedInSpatialStructure FOR RelatedElements;

ENTITY IfcBuildingElement;

INVERSE

ProvidesBoundaries

SET OF IfcRelSpaceBoundary FOR RelatedBuildingElement;

HasOpenings

SET OF IfcRelVoidsElement FOR RelatingBuildingElement;

FillsVoids

SET [0:1] OF IfcRelFillsElement FOR RelatedBuildingElement;

ENTITY IfcRampFlight;

END_ENTITY;