2nd floor

You can guess roughly at the floor plan now: the building is a long rectangle, with a central core of the stairwell and the lift shafts. There are structural pillars that appear in the same place each time, tying the floors together. The placement of the walls and doors is otherwise a bit random. The second floor has more, smaller, office units, but you wander around, opening doors, peering inside at the acres of mostly empty, but still carpeted, space.

 Go back to the staircase.