The opening angle of the fire door affects the clear width of evacuation on the one hand, on the other hand, it also directly affects the clear width of the evacuation path. Although the current fire doors and conventional evacuation doors can be guaranteed to open normally at 120° (or even 150°), 90° should be adopted when determining the maximum clear evacuation width.
Repeated opening should not affect the reliability of the evacuation door. Although the current fire doors and conventional evacuation doors can usually be guaranteed to open normally at 120° (or even 150°), the opening angle of the fire door reliability test is only 70°, and some evacuation doors open at too large an angle Time will affect product quality. Therefore, it is relatively reasonable to determine the opening angle of the evacuation door at 90°, and this angle also effectively utilizes the effective clear width of the evacuation door.
