This example illustrates a standard case slab with extruded solid geometry, based on a material layer set usage definition. It includes one round opening and one rectangular recess. Figure 520 shows the resulting shape.

NOTE  The opening and recess are instances of IfcOpeningStandardcase.
slab_with_openings

Figure 520 — Standard case slab with opening and recess.

NOTE  There is no color information within the file, the displayed color has been set by the target application as a default.