Before I go sleep, I'll just leave this here so that you can get a bit of a sense of scale of how large a RL steelworks can be. Size of Manhattan is something that's pretty much viable for some of them since Manhattan has only around 59 square kilometers of ground area.
[center][img]https://upload.wikimedia.org/wikipedia/commons/a/aa/Hoogovens.JPG[/img][/center]
This is why I didn't thought that I needed to explain that as metal working factory is HUGE. In all likelihood, KC-00032 is even bigger than that, since it's not only a metalworks factory but also has an integrated production line for all kinds of weapons and machinery including giant mechs.

Also, have this video of a hot steel rolling mill, that I just love, so that you can have an idea of why these factories need to be that huge:
[center][youtube]https://www.youtube.com/watch?v=AuuP8L-WppI[/youtube][/center]