It seems that there is a standard expectation in the design of space facilities. Even with the ability to design in fairly wild ways, people seem to think that space stations ought to follow a hierarchical design. There is usually a wide cone-like top with a shaft and rings around a central shaft. This design suggests a need to find familiarity with gravity based designs which are bottom up with floors stacked on top of each other. Unless there is a form of artificial gravity one doesn’t need to design in such a way. Floors could be perpendicular or diagonal to each other. Floors don’t even have to necessarily exist where one might simply have a series of spheres connected by conduits. Any number of configurations are possible in zero gravity.