IfcVoidingFeature
What is IfcVoidingFeature?
IfcVoidingFeature represents a modification to an element that removes material, such as a cutout, notch, hole, or edge chamfer. Introduced in IFC4, it provides more specific void types than the generic IfcOpeningElement, including edge features and surface features.
Common Properties
Properties commonly found on IfcVoidingFeature elements in IFC models.
Real-World Usage
VoidingFeature is used for detailed fabrication models where specific cut types matter — notches in steel beams for duct clearance, chamfers on concrete edges, or precise hole patterns for bolt connections.
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IfcOpeningElement
IfcOpeningElement represents a void or hole cut through a building element such as a wall, slab, or roof. Openings are used to accommodate doors, windows, ducts, pipes, and other penetrations. The opening itself is a subtractive element — it defines the shape to be removed from its host element.
Building ElementIfcWall
IfcWall represents a vertical construction element that bounds or subdivides spaces. Walls are one of the most fundamental building elements in any IFC model, defining the physical envelope and internal partitioning of a building. IfcWall can represent both load-bearing structural walls and non-load-bearing partitions.
Building ElementIfcSlab
IfcSlab represents a horizontal construction element that forms the floor, roof, or landing of a building. Slabs can be classified as floor slabs, roof slabs, landing slabs, or base slabs (foundations). They are typically the largest elements by area in a building model.