I'm modeling Mechanical systems for a cancer center with several floors. They've decided that the mains (hvac, piping, plumbing) are going to be for one bid pack, and then the tenant fit-out (vav boxes, branches to rooms) for each floor will be apart of another bid pack.
The problem is that we have to show the mains in one model and then line everything up for the branches in the other models (for the various floors). Then everytime we change something in one model we have to check that it is still aligned in the other models. It's a pain to work with. Plus we've had to customize the linked models so that in the tenant fit-out models the mains are shown lighter (existing) than the branches.
We were going to try to put the mains and branches on different systems (shell and core supply, first floor supply, ect...) but you can't connect them otherwise they will switch to one system type. We can't seem to come up with a better way to approach this project scenerio....