Defined in File Ifc4.h
IfcRelVoidsElement: public Ifc4::IfcRelDecomposes¶
IfcRelVoidsElement is an objectified relationship between a building element and one opening element that creates a void in the element. It is a one-to-one relationship. This relationship implies a Boolean operation of subtraction between the geometric bodies of the element and the opening.
As shown in Figure 50, the insertion of a void into a wall is represented by the relationship IfcRelVoidsElement. The opening is created within the wall by IfcWall(StandardCase) o IfcRelVoidsElement o IfcOpeningElement.
Figure 50 — Relationship for element voiding
HISTORY New entity in IFC Release 1.0