No floor rule
No floor rule
No floor rule
You see this often in data centers where a set of double doors open on an exterior wall to allow equipment to be forklifted onto upper floors where a freight elevator may not be available. Idk how to make that sentence less dry, sorry. 😬
That's what some posh people would call a "window"
Door at the edge of flat Earth.
The door on the ice wall
If this sign is visible while going up the stairs, it's silly. If it is while going down, it is terrifying.