Assigning Buildings and Floors

In the IFC Export dialog, Output tab, click Assign (Assign Building and Floors) to open the Assign Models to Spatial Containment dialog.

Note: The default Site/Building assignment (in the active model, including all references) is to the first (and only) building, defined in the Floor Manager. The default Floor assignment is Auto Detect (they are assigned to the Floor in which range the building model components). The range is defined by the floor elevation value and the elevation value of the floor above.

In the Assign Models to Spatial Containment dialog:

To override the current Site/Building assignment of a model or reference, click the corresponding Site/Building cell and select another building from the drop down menu. If the Site option is selected from the drop down menu, the Floor assignment is removed and disabled.
To override the current Floor assignment, click the corresponding Floor cell and select a floor, Auto Detect, or (None) from the drop down menu. If the (None) option is selected from the drop down menu, the model or reference is assigned to the Building that is set in the Site/Building column.
Turn on the Inherit Floor Assignment from Reference Parent setting to assign all nested references to the same Building/Site and Floor, as the parent model.
Click Open Floor Manager to open the Floor Manager where spatial structure can be defined (see Define the Spatial Structure section).
Click Save to save assignments and close the dialog.
Click Close to close the dialog without saving changes.

In the IFC Export dialog, Output tab:

Turn on the Create COBie Spreadsheet setting to create a COBie spreadsheet. Microsoft Excel must be used to open the spreadsheet. Turning on Open COBie Spreadsheet, opens the same upon export.
Turn on Zip IFC file to zip the file.

In the IFC Export dialog, click Export to export the model to IFC. The model is exported in the STEP Physical File Format, SPFF.

In the IFC File for Export dialog, you can optionally change the Save in folder (the default is …\Output\IFC) and change the File name (the default is the name of the active DGN with an .IFC extension).