I have a hard time understanding why external circulation is being capitalized the same as interior corridor for the common factor. In my situation, the external circulation goes all around the building to service all tenant entrances which is quite long. Whereas if this was an internal corridor, it would only be central to the building and thus much shorter. So my situation creates quite large common factor because of the long corridor. Also,surely there is much less expense to maintain an external passage? It does not have ceiling system, it isn't conditioned, there is no maintenance of finishes(paint, carpet, lighting, etc). There is some maintenance such as cleaning, painting handrails, etc as would be for a parking but not nearly as extensive as internal corridors. IF you could provide me with some information to guide me here on how to deal with a high common factor I'd appreciate it.