> Fire door, alarm will sound Honestly it's a little ambiguous and confusing. When will the alarm sound? "When there's a fire" is the immediate answer that com

> Fire door, alarm will sound Honestly it's a little ambiguous and confusing. When will the alarm sound? "When there's a fire" is the immediate answer that comes to my mind. Doors don't generally trip loud alarms when you open them. Not once in my life have I ever come across such a door. The idea is pretty foreign to me. Wouldn't be surprised if others were equally confused. You were familiar with that particular door and its alarm-tripping nature, others probably weren't. "Alarm will sound if opened" might have reduced such incidents.