4.1.7.1.13 Surface Geometry

Elements may have a 'Surface' representation describing the outer surface of the object. Such representation may be used for hit-testing objects having part composition such as framed walls, or for defining thermal boundaries idealized at the middle plane of an element.

The representation identifier of the surface representation is:

IfcShapeRepresentation.RepresentationIdentifier = 'Surface'

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.A

General Usage

ApplicableEntity
IfcElement

Table 4.1.7.1.13.B