The Pipe Connection Zone worksheet in the SpaceMgmt.xls workbook defines zones that will have routed objects. A connection zone serves as a placeholder for route (pipe, cable, and so on) that has yet to be modeled.
In addition to the common properties discussed in Space Management worksheets, the following properties can be defined for a pipe attraction zone:
Obstruction
Specify whether the zone allows routing through it (1) or whether the zone allows routing up to it, but not through it (0).
ConnectionFace
Specify the side of the zone through which you want to route.