This works bottom-up through all four ceiling levels, the same pattern as the wall hierarchy.
Prerequisites
All four ceiling levels are copied.
Steps
1.) Describe the Single Ceiling Panel Item. Add a new, specific description, saving via a new table tab.
2.) Describe the Ceiling Panel Row and assign the Panel Item to it. Add a description for the Ceiling Panel Row, then determine related BIM components and assign the Single Ceiling Panel Item from step 1.
3.) Describe the Ceiling Panels, assign the Panel Row, and define columns and rows. Add a description for the Ceiling Panels, assign the Ceiling Panel Row from step 2, and define the panel columns and rows settings.
4.) Describe the Car Ceiling. Add a new, specific description for the copied Car Ceiling.
5.) Assign the Ceiling Panels to the Car Ceiling. Determine related BIM components for the Car Ceiling and assign the Ceiling Panels from step 3.
6.) Assign the Car Ceiling to the Car Design. Determine related BIM components for the Car Design and assign the finished Car Ceiling.
Result
The four-level ceiling hierarchy is fully described and assembled, and attached to the Car Design from the wall section.