Use the Default Hierarchy

If your export mapping does not create an Ifc Spatial structure, the system will create a default one:

An IfcProject with name "Default Project"

No IfcSite is defined

An IfcBuilding with name "SYSTEM_DEFAULT_BUILDING" contained within the default IfcProject

No IfcBuilding Story or IfcSpace instances are created.

All Building Elements are "spatially contained" within that building

(Note that some systems require an IfcSite or IfcBuildingStorey to be present in the IFC file, if this is required you must define it with one of the mapping options below).