Navigation

IfcRelVoidsElement

Definition from IAI: Objectified Relationship between an building element and one opening element that creates a void in the element. This relationship implies a Boolean Operation of subtraction for the geometric bodies of Element and Opening Element.

HISTORY New entity in IFC Release 1.0
ISSUE See issue log for changes made in IFC Release 1.5.1.

EXPRESS specification:

ENTITY IfcRelVoidsElement
SUBTYPE OF ( IfcRelConnects);
RelatingBuildingElement  :  IfcBuildingElement;
RelatedOpeningElement  :  IfcOpeningElement;
END_ENTITY;

Attribute definitions:

RelatingBuildingElement  :  Element in which a void is created by associated Opening Elements.
RelatedOpeningElement  :  Opening Elements which define voids in the associated Element.

References (3):

Name Type Referred through Express-G
IfcBuildingElement Entity
Attribute 'HasOpenings'
Diagram 4
IfcOpeningElement Entity
Attribute 'VoidsElements'
Diagram 4
IfcRelConnects Entity
Subtype
Diagram 1

Inheritance graph

ENTITY IfcRelVoidsElement;
ENTITY IfcRoot;
GlobalId  :  IfcGloballyUniqueId;
OwnerHistory  :  IfcOwnerHistory;
Name  :  OPTIONAL IfcLabel;
Description  :  OPTIONAL IfcText;
ENTITY IfcRelationship;
ENTITY IfcRelConnects;
ENTITY IfcRelVoidsElement;
RelatingBuildingElement  :  IfcBuildingElement;
RelatedOpeningElement  :  IfcOpeningElement;
END_ENTITY;