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Definition of buildingSMART: The railing is a frame assembly adjacent to human circulation spaces and at some space boundaries where it is used in lieu of walls or to compliment walls. Designed to aid humans, either as an optional physical support, or to prevent injury by falling. A list of references to accessory/mounting hardware for this railing might be given by including these assessories (IfcDiscreteAssessory) through the objectified relationship IfcRelAggregates.

HISTORY New Entity in IFC Release 2.0

Property Set Use Definition:

The property sets relating to the IfcRailing are defined by the IfcPropertySet and attached by the IfcRelDefinesByProperties relationship. It is accessible by the inverse IsDefinedBy relationship. The following property set definitions specific to the IfcRailing are part of this IFC release:

Geometry Use Definitions

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

Local placement

The local placement for IfcRailing 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.

Geometric Representation

Currently the use of 'BoundingBox', 'SurfaceModel', 'Brep' and 'MappedRepresentation' representations of IfcRailing are supported. The conventions to use these representations are given at the level of the supertype, IfcBuildingElement.

EXPRESS specification:

ENTITY IfcRailing
SUBTYPE OF ( IfcBuildingElement);
PredefinedType  :  OPTIONAL IfcRailingTypeEnum;

Attribute definitions:

PredefinedType  :  Predefined generic types for a railing that are specified in an enumeration. There may be a property set given for the predefined types.
NOTE: The use of the predefined type directly at the occurrence object level of IfcRailing is only permitted, if no type object IfcRailingType is assigned.
IFC2x PLATFORM CHANGE: The attribute has been changed into an OPTIONAL attribute.

Inheritance graph

ENTITY IfcRailing;
GlobalId  :  IfcGloballyUniqueId;
OwnerHistory  :  IfcOwnerHistory;
Name  :  OPTIONAL IfcLabel;
Description  :  OPTIONAL IfcText;
ENTITY IfcObjectDefinition;
HasAssignments  :  SET OF IfcRelAssigns FOR RelatedObjects;
IsDecomposedBy  :  SET OF IfcRelDecomposes FOR RelatingObject;
Decomposes  :  SET [0:1] OF IfcRelDecomposes FOR RelatedObjects;
HasAssociations  :  SET OF IfcRelAssociates FOR RelatedObjects;
ENTITY IfcObject;
ObjectType  :  OPTIONAL IfcLabel;
IsDefinedBy  :  SET OF IfcRelDefines 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;
HasCoverings  :  SET OF IfcRelCoversBldgElements FOR RelatingBuildingElement;
HasProjections  :  SET OF IfcRelProjectsElement FOR RelatingElement;
HasStructuralMember  :  SET OF IfcRelConnectsStructuralElement FOR RelatingElement;
ReferencedInStructures  :  SET OF IfcRelReferencedInSpatialStructure FOR RelatedElements;
HasPorts  :  SET OF IfcRelConnectsPortToElement FOR RelatedElement;
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;
ENTITY IfcRailing;
PredefinedType  :  OPTIONAL IfcRailingTypeEnum;