As far as I've discovered: this is all the rooms, halls and stair types that can generate in this map.

*Tiny Sized Rooms
-Storage Closet | A small closet with props and can also contain items.
-Server Room | A tiny server room, sometimes generates with an office chair and a keyboard.

*Small Sized Rooms
-Office Room | A small office room with a desk and computer with a random prop that spawns on the desk.
-Bathroom | Nothing special, just a bathroom.

*Medium Sized Rooms
-Cubical Offices (Varies between medium and large, depending on generation) | Many cubicals, with random props for each cubical. Sometimes generates with windows and a small area with doors.
-Room | A normal room, few doors, sometimes generates with tables or lockers.
-Bigger Storage Room | Generates crates, pallets, and barrels inside two fenced areas.
-Workshop | Has multiple things that can generate in it, including vending machines or a bicycle. You can find a crowbar here too.
-Laundry Room | Leads down into a big laundry room via staircase. Dead end.
-Break Room | Simple break room with chairs and vending machines. Generates with a clock or a TV.

*Large Sized Rooms
-Turbine Room | Generates 2 machines, a catwalk and many doors.
-Crusher | The crusher will never generate leading into the control room, you will have to find your way into the control room yourself or noclip into it.
In the control room, there is a stop button to halt the crusher, an open trapdoor button that opens the ceiling trapdoor which props fall out of, and a valve to set the speed for the crusher. An alarm will play if the player gets too close to the crusher.
-Horse Statue Room | A room with a giant statue of a horse in the middle, capable of generating many floors containing doors.

*Hallways
-Narrow Hallway | Very narrow hallway, typically with a high door count.
-Storage Hallway | Simple storage hallway with shelves and props.
-Hallway | Regular hallway, mediocre door count.
-Large Hallway | Larger hallway, usually has less doors than Normal and Narrow. Capable of generating a cross-section.

*Staircases
-Tiny L-shaped Staircase | A very small staircase that leads up or down in an L shape, going either left or right. If you manage to generate this staircase with a pre-existing door leading into the bottom of the staircase, it will generate with a supply crate or a health station.
-Medium Staircase | Regular staircase capable of generating more floors. Sometimes generates with or without windows.
-Large Staircase | About the same size as Medium, but with a different layout and generates more doors.

Doors that generate leading into rooms that have already been generated will be locked. Rooms that generate next to unopened doors will automatically connect doors into itself.

And that's all that I know of. Do what you want with this information I guess lol.