4.1.7.1.13.1 Surface 3D Geometry

The Surface 3D Geometry is the standard surfacic representation for elements having a 'Surface' representation describing the inner or outer surface of the object, e.g. for defining thermal boundaries idealized at the middle plane of an element.

The following attribute values for the IfcShapeRepresentation holding this geometric representation shall be used:

IfcShapeRepresentation.RepresentationIdentifier = 'Surface'
IfcShapeRepresentation.RepresentationType = 'Surface3D'
IfcShapeRepresentation.Items = IfcBoundedSurface, IfcSweptSurface

The following diagram shows the generic classes and relationships used when applying this concept. In addition, concepts may have particular importance to common or standardised industry practices and scenarios. For these specific usage scenarios, the table below shows a recommended list of general usage patterns that users may adopt.

Figure 4.1.7.1.13.1.A

General Usage

ApplicableEntity
IfcElement

Table 4.1.7.1.13.1.B