MEP Element Display on Stories
The display of MEP elements on stories depends upon its “Show on Story” setting (Floor Plan and Section panel). The “Show on Story” option of “All Relevant Stories” is used for all MEP elements by default.
With this option, straight segments that intersect stories are displayed as cut on the relevant stories, and the 2D representation (“Projected” or “Symbolic View”) can be set with the “Floor Plan Display” GDL parameter in the 2D Representation group, in the MEP Custom Settings Panel.
Other MEP elements that intersect stories, however, do not have cut displays - they are shown either on one story or the other.