Together, the Upper Limit and Limit Offset parameters define the upper boundary of the room.
For example, suppose a room starts at Level 1. To indicate that it should extend upward 4000 mm above Level 2, specify an Upper Limit of Level 2 and a Limit Offset of 4000 mm. By default, the Limit Offset is the distance between levels (10’ or 4000 mm).
In the following section view: