It is necessary to re-inspect the fire doors produced by qualified (glass fire doors) manufacturers, or after the fire glass is made into doors. Qualified!
The window glass on the fire door is not as big as you want to do. There are strict regulations in this respect, if the area of fire-proof glass with glass fire door exceeds 15% (compared with that of a single door leaf, which is known to be inlaid with glass), it is regarded as different units if it does not exceed 30%, the area of fire glass with glass fire door is more than 15%, which cannot be divided into the same unit as the area of fire glass plate less than or equal to 15% of the Portal area. If the area of fire-proof glass reaches or exceeds 30% of the area of fire-proof door fan, it is regarded as a glass fire-proof door. For more information, please refer to the fire-proof product qualification assessment center of the Ministry of Public Security "fire-proof product type approval implementation rules fire-proof door products".
Fire-proof glass is calculated according to the area, that is, the price of fire-proof glass is added to the price of fire-proof doors.
As we all know, some ordinary steel fire doors can bring a viewing window which is made of fire-proof glass. In fact, fire-proof glass can also achieve the effect of fire-proof and heat-insulation, the fire resistance limit can reach the fire prevention effect of steel fire doors. The fire resistance time of Class A can reach 1.5H; Class B can reach 1.0h; Why can fireproof glass achieve this fireproof effect?
Now, it is mainly analyzed from the structure of fire-proof glass. This kind of fire-proof glass is not an ordinary monolithic fire-resistant glass, and monolithic fire-resistant glass can only achieve the effect of fire prevention but not the effect of heat insulation, fire-proof glass should be able to achieve both fire prevention and heat insulation, and the heat insulation effect can be achieved by adding fire-proof liquid in the middle. The thickness of Class A fireproof glass is 35mm; The thickness of Class B fireproof glass is 30mm; In this way, the effect of both fire prevention and heat insulation can be achieved.
We can enlarge this kind of fireproof glass and add it up with steel frame to make it into a fire door, so the technology department of Beijing Yonggu fire door factory solemnly explains that there is such a large glass fire door in the fire door, however, there is no such product for all-glass fire doors. And this kind of fire door is only Class A at present.
