Those drawings are really nice.
My own inclination with something like that would also have been to use girder type supports, but the block approach that you have taken is far more practical. It also has its own nice and brutal, vaguely Cold War, huge-lumps-of-concrete aesthetic. I love it.
Cant see you selling that piece of scenery off in the future, it is just too versatile.
Definitely.
I can see a pipeline like that running through a Bladerunner style future LA or Mega City One or travelling over the heads of the inhabitants of a District 9 type slum, while just as easily its the only sign of civilisation in a remote Harry Harrison Deathworld type jungle.
Im going to have to lift this design wholesale. Its too practical, versatile and cool looking not to.
Im assuming that the pipeways attach to the buildings and to each other in some way (magnets or some sort of plug maybe). If you get a chance then I would very much like to see how you plan to make that work.