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What are the requirements for the fire door of the shelter? What are the specifications for fire doors in shelters?

According to Article 5.5.32 of the Code for Fire Protection in Building Design: for residential buildings with a building height greater than 54m, each house should have a room that meets the following requirements: it should be set against the external wall, and external windows can be opened; internal and external walls The fire resistance limit of the body should not be less than 1.00h. The door of this room should be a class B fire door . The fire integrity of the outer window should not be less than 1.00h.

The respective total net widths of the doors, safety exits, evacuation walkways and evacuation stairs of residential buildings shall be calculated and determined, and the net widths of the doors and safety exits shall not be less than 0.90m. The net width shall not be less than 1.10m. The evacuation staircase with railings in one side of the residence with a building height not greater than 18m shall not be less than 1.0m.
The relevant requirements of the fire protection code for building design:
1. There are no less than 2 evacuation doors or safety exits in first- and second-grade fire-resistant buildings in the audience halls, exhibition halls, multi-purpose halls, restaurants, business halls, etc., from any point in the room to the nearest evacuation door or safety exit. The distance should not be greater than 30m.
2. When the evacuation door cannot pass directly to the outdoor ground or evacuation staircase, an evacuation walkway with a length of not more than 10m should be used to reach the nearest safety exit. When an automatic sprinkler system is installed in this place, the safe evacuation distance from any point in the room to the nearest safety exit can be increased by 25%.
3. The net width of the evacuation walkway in the audience hall shall be calculated as not less than 0.60m per 100 people, and shall not be less than 1.00m; the net width of the side walkway shall not be less than 0.80m.
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