When modeling a mixed use project or working on certain renovation or single-floor studies, it may be necessary to import floor(s) that are above. By default, when importing to the platform, the bottom most floor imported will be placed at ground. In order to import floors that "float" above the ground level, you can model a small square (1'x1') floor element at the ground level in your model. This will have a negligible impact on the results from your model, and will force the main floors for analysis to the proper height!
For instance, if there is a single floor of interest in a project, you would model a small element on the first floor as shown above and the target floor as floor elements. The remainder of the floors could be omitted or placed on the shading device layer.
Similarly, in drawing.tool, you can model a small floor element on the first floor, then model your additional/focus floors at higher levels to ensure the geometry is imported to 3D Analysis properly.