>>512944524
That wasn't molten iron. As you tried to pre-empt, what it was was all sorts of plastic shit and pot metal cheap crap like the drawer pulls on desks. It would drip down and accumulate and pool together until it found an outlet.
The buildings were not a block o steel irder cubes like we see in the buildings of the 1920s and 30s. They were glass boxes with a device of an inner supporting tube.
It was a tech that had never been tried before, and will probably not be tried again. They may not have been 100% built to spec anyway.