In our building the doors to the stairwell lock behind you automatically. They aren't unlocked except at the basement level. No level is accessible from the stairwell except the basement.
Thus, you must take the elevator if you want to go upstairs.
According to this sign, fire regulations require this. But that doesn't make any sense to me.
Let's say there's a fire on the third floor. Somebody on the fifth floor tries to evacuate. He heads down thr stairs, but two floors below there's a fire. All the doors above him are locked. Now this guy is stuck in the stairwell where I'm guessing he's far more likely to die from the smoke.
Why would fire regulations ALLOW such a thing, to say nothing of requiring it?
What am I missing?