No, the MEP engineers aren't relying on Revit volumes. We're not far enough along as a company to be using Revit to it's full potential... they still use an abacus for some things here. lol

You do raise a good question about the code, however, and I'll check with my lead on that.

No, we're not providing areas in a schedule, just square footage in a tag on our code drawings.

Good comments. Thanks

Sure hope you don't have a MEP engineer relying on the volume of that hallway for his calculations.
Besides that: the area where they actually cross each other is now counted for BOTH hallways. Is that really the way your building codes want it?

How about this:
I'm guessing you're providing the areas through a schedule. So sort by number and check off "itemize every instance". Set "calculate totals" for the Area and you will have a single line hallway with the total area even though they're actually two rooms in Revit.

Thanks! That's the workaround I was looking for. Excellent idea, hypnox1

Yes, you actually can achieve what you are looking for. What I do in these situations that it is desired is to create a new level at the bottom of the ceiling. Then on that new level create the room bounding lines for the room that will carry through in the lower area. Drop a room in and go to a section that is cutting the hallway where they are crossing. Then drag the bottom of the room down to the floor level and the top of the room to the ceiling location. Take a look at the attached example project to see what I did. You will see the room separation lines on Level 3, which is actually the bottom of the ceiling, that controls the crossing hallway. This is about as close as possible as you will get to what you are looking for without resorting to your current method of two separate rooms with the same number.

If you are looking for dead accurate SF's this will not work sadly.

Tried that. It just creates a new, different room. I wouldn't care so much if I didn't have a code dwg that reports square footage

Maybe create one room like you want, then ctrl+x it, create another, ctrl+v?

Thx for the reply. If you mean room separation lines, I tried that, but I ended up with one hallway that's continuous, and one that is split by the first hallway. I can't think of another way to use those lines, can you?

If you mean something other than room separation lines, then I don't know what you mean lol

I attached a pic to explain.

PS. For clarity, room # 1015 is actually two different rooms with the same name/number. 1017 is one single room

Try manually configuring the room boundary.