E.9.1 Wall elemented case

This example illustrates a framed wall with openings suitable for a door and window.

NOTE  The example wall is very typical of residential construction in the U.S., consisting of "2x4" framing with gypsum panels on each side.

The wall has three layers: forward-facing drywall, framing, and rear-facing drywall. Each of these layers are modeled as IfcMaterialLayer and have corresponding parts which elaborate each into elements. Geometry for items makes use of IfcMappedItem for efficiency in storage and processing, such that a mesh for each shape need only be instantiated once, and then transformed multiple times.

• The 'Axis' representation of the wall indicates the parametric path for which the component geometry is generated.
• The 'Body' representations of the components is derived from the defined types, the axis path, and the order of the layer as defined by the material layer set.
• The 'Surface' representation of the wall is derived from the boundaries of the component geometry.

NOTE  The particular rules defining layout of components of framed walls are out of scope of this specification.

The example in Figure 481 shows the solid representation of the elemented wall, the example in Figure 482 shows the same elemented wall in transparent mode.

Figure 481 — Elemented wall solid representation	Figure 482 — Elemented wall transparent representation to show inner structure

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