Regarding other photographers/artists who did similar things, I think this guy does something quite different in amplifying (rather than minimizing) the inherent discontinuity in assembling separate images into a whole. All his images share a pretty standard "true-to-life" bottom row or foundation, then things get rapidly out of whack as you go up. Or another way to put it, he shows these iconic structures (representative of human genius and engineering prowess) as teetering and fragile. I love the sense of it all tumbling down.
They certainly look like they were shot in sequence. That gets to the technical achievement. I guess we'd need higher resolution versions so we could see the frame numbers. I'm sure he wasted lots of film to get the strips he could use.
This stuff also reminds of the Japanese photographer who makes maps of cities with hundreds (thousands?) of contact sheet images.