1.The concept of steel fire windows
Fire window refers to a window that can meet the requirements of fire stability and fire integrity within a certain period of time. Fire windows are usually installed on firewalls or fire doors.
The role of fire windows is to isolate and prevent the spread of fire. Such windows are mostly fixed windows.
The second is daylighting. This type of window has a movable sash. Under normal circumstances, it is lighted and ventilated. Fire windows of movable sashes shall have manual and automatic closing functions.
Steel fire window
2. Classification of steel fire windows
(1) According to the installation method, it can be divided into fixed sash fire windows and movable sash fire windows.
(2) According to the fire resistance limit, it can be divided into Class A, B, and C, and the window with fire resistance not less than 1.5h is a Class A fireproof window.
1h的窗为乙级防火窗，耐火极限不低于0.5h的窗为丙级防火窗。 Steel fire windows whose fire resistance is not less than 1h are Class B fire windows, and windows whose fire resistance is not less than 0.5h are Class C fire windows.