I've spent a long while studying that particular corridor and trying to puzzle out how they fitted the various rooms we see into it. The corridor itself sports some very odd architectural features, not least of which it a couple of steps DOWN at the far end!
Just look at that door - it's a foot and a half below the deck line!
Of course, anyone who's read Solow & Justman's book will know about the awful slanting floors in the studio where the pilots were shot, and that they had to physically raise parts of the sets in order to keep the floors level.
However, in-universe it raises some interesting questions...