How to set fire protection function for doors and windows of ancient buildings? How to set fire doors and windows!

The 0.5-hour fire resistance limit is Class C 1) According to the fire resistance limit, fire doors and windows are divided into Class A, Class B and Class C, and the fire resistance limit is not less than 1.50h, 1.00h and 0.50h respectively, which are applied to firewalls, evacuation stair doors and shaft inspection doors respectively. (2) According to the material, it can be divided into wood, steel and composite fire doors. (3) According to the door leaf structure, it can be divided into Liangzi without Liangzi; Single fan, multiple fans; All-glass door, fireproof glass fireproof door. Fire windows are composed of steel window frames, steel window sashes and fire-proof glass, which can isolate and prevent the fire from spreading. Generally, it is set in the hole or skylight on the external wall of a building with insufficient fire spacing, the part to be observed on the firewall or fire partition in the building, and the hole on the external wall to prevent the vertical spread of fire. Fire windows can be divided into fixed sash and movable sash according to their installation methods. Fixed frame fire window, which can't be opened, can light and shelter from wind and rain at ordinary times, and can prevent the fire from spreading in case of fire; The movable sash fire window can be opened and closed, and it can be automatically closed in case of fire to prevent the fire from spreading. After opening, it can remove smoke and can also be used for lighting and ventilation at ordinary times. In order to open and close the sash of the fire window, automatic and manual switching devices must be installed. The fire resistance limit of fire windows is the same as that of fire doors. Fire windows installed on the firewall and fire partition wall should be windows that cannot be opened or have automatic closing function in case of fire.