It's amazing how much of it comes together in the last week. From my experiences, most of what you see structurally is tent or scaffold frame, with sheet wood cladding over it, and sculptural artworks giving the biggest visual impact. Putting the big bits up didn't seem to take long (done by specialist people who spend their whole time rigging and de-rigging the same structures over and over again). The cladding and flooring was a bit long-winded, but really not that bad. Making and rigging the artworks and objects (rockets, giant telly's, tentacles, airplane parts, gutted automobiles, etc.), seemed to be the most fiddly and awkward job, with some large scale artworks requiring welding, machine lifting, fitting, painting in-situ, etc., on site over a period of weeks.