IFC 4.3.0.1 (IFC4X3) development

7.11.2.12 IfcVoidingFeatureTypeEnum

7.11.2.12.1 Semantic definition

This enumeration qualifies a voiding feature regarding its shape and configuration relative to the voided element.

7.11.2.12.2 Type values

Type Description
CHAMFER

A skewed plane end cut, removing material only across a part of the profile of the voided element.

CUTOUT

An internal cutout (creating an opening) or external cutout (creating a recess) of arbitrary shape. The edges between cutting planes may be overcut or undercut, i.e. rounded.

EDGE

A shape modification along an edge of the element with the edge length as the predominant dimension of the feature, and feature profile dimensions which are typically much smaller than the edge length. Can for example be a chamfer edge (differentiated from a chamfer by its ratio of dimensions and thus usually manufactured differently), rounded edge (a convex edge feature), or fillet edge (a concave edge feature).

HOLE

A circular or slotted or threaded hole, typically but not necessarily of smaller dimension than what would be considered a cutout.

MITER

A skewed plane end cut, removing material across the entire profile of the voided element.

NOTCH

An external cutout of with a mostly rectangular cutting profile. The edges between cutting planes may be overcut or undercut, i.e. rounded.

USERDEFINED

A user-defined type of voiding feature.

NOTDEFINED

An undefined type of voiding feature.

Table 7.11.2.12.A

7.11.2.12.3 Formal representation

TYPE IfcVoidingFeatureTypeEnum = ENUMERATION OF
	(CHAMFER
	,CUTOUT
	,EDGE
	,HOLE
	,MITER
	,NOTCH
	,USERDEFINED
	,NOTDEFINED);
END_TYPE;

7.11.2.12.4 References

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