Boarding Action is a multiplayer map on Halo 1, where 2 ships oppose eachother and where you can shoot towards the other ship. The ships have a death barrior inbetween, so you can't jump to the other ship. In stead you have to use teleporters. What the guy earlier tried to ask is if it would only be the two appartments or if there would also be a ground level.
As I said, make them skinny, not wide. It would save a lot of resources. Make some ground cover, a vehicle arena type thing, or block off that part of the map to save resources.
It was my idea to do this, but nice ASCII diagram. It'll look something like that. Probably put the bridge in the 3rd storey.