Let me summarise here: this room is an underground freight station or goods station. This is basically a type of big chamber where train locomotives transport and dump out resources across the whole facility. I feel that not only would it seem more sense that the facility would have this, since the Foundation is super massive and getting to different sites by foot would likely take a long time.. but it could be a way of the player getting from LCZ to HCZ (or SHCZ) possibly?
If you would like more detail on the idea, I've already attached a thread on the Suggestions section where I had explained it fully.
Here's a 2-dimensional draft of the room layout, along with, well, quite alot of notes and stuff. I apologise if there's any detail that's unreadable or confusing.
Below is just a visual example. The "Level 4" sign is a sample; renaming it ground floor ("G") could've sound more sensible though, but whatever: