Do fire doors leading to the roof need to be equipped with exit signs?

Need. According to the Code for Fire Protection Design of Buildings, the exit sign light is installed above the exit door frame. When the door frame is too high, it can be installed on the side of the door frame. In order to prevent the smoke generated in the fire from affecting the visual field, the installation height should be 2-2.5 meters, and the front picture of the emergency exit light should keep a vertical angle with the emergency evacuation passage as far as possible.