IFC Spatial Structure

An IFC file contains a single IfcProject container instance which is the root to which all other entities are linked.

There are several possible valid hierarchies of Ifc Spatial Structure instances, but the most common arrangement is:

Note:
This is the hierarchy supported by E3D Design IFC Export. There are several ways in which you can set up this hierarchy

• The unique IfcProject usually contains (via an IfcRelAggregates instance) one or more IfcSite instances

• The IfcSite instance(s) or the IfcProject contain (via IfcRelAggregates instance(s)) one or more IfcBuilding instances.

• The IfcBuilding instance (s) usually contain (via IfcRelAggregates instance(s)) one or more IfcBuildingStorey instances

• In addition IfcSite and IfcBuildingStorey instances may contain IfcSpace instances.