With that kind of technology why would you have a guy with a measuring tape and making adjustments by visual. Not even using a straight edge!! Set the limits on the machine and have it done exactly the same each time.
I said the same thing to myself, especially when he was walking under that part as they were turning it over. OSHA would have a field day at this place
Interesting to see the pressure rollers just behind the weld heads, stopping the lower plate curling up toward the web, I had not see anything do that before - but then I haven't seen something welding beams this size before either.