IFC requires a clearly defined special containment structure, such as Project, Site, Building (Zones), Building Storeys, Spaces, and Components for example. Spatial structure is created in the Floor Manager.
Regarding IFC Floor Assignments and Spatial Containment, the following rules apply:
- Spaces are automatically assigned to the floor, containing the floor range where the space shape falls, regardless of the model assignment to a floor.
- Doors, windows, and FF&E can be assigned to one space only. They are automatically assigned to the same floor as the space they are contained in.
When you model a façade over 3 floors in one model with windows on each floor, the walls are assigned to the floor where the base of the walls are, but the windows are assigned to their respective floors – based on the range defined in Floor Manager, if they are bounded by a space.
- Elements not contained or bounded by spaces (such as walls, columns, beams, slabs, ducts, and pipes) are automatically assigned to a floor, or to the floor/building overridden in the Assign Models to Spatial Containment dialog.
- Doors, windows, and FF&E can be contained in only one space, but doors and windows can be bounded to 1 or 2 spaces.
- Doors are contained in the space that the door swings into, and this is reflected in the COBie spreadsheet.
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