Sci-Fi Corridor: How do the pieces fit?

Got the package with 1x1 technic bricks so I can show you how the pieces are meant to be connected.

One 4x12 piece with wall, three 4x12 walkways (before texturing), some friction pins.

The above pieces can be arranged like that...

...or that...

...or that...

or that. As you can see - I use some pipes and other bits to add some texture inside the holes on the 'flat' side of the walls.