Its fire insulation degree and fire integrity are greater than or equal to the following values: Class A should be 1.50h; Class B response is 1.0h; Class C should be 0.5h.
The answer material of grade a fire door is divided into steel and wood, so it is divided into steel fire door and wooden fireproof door.
1. The wooden grade a fire door is made of high-quality wood with flame retardant treatment as the framework, with a high-density wood grain plate formed by one touch and pressing as door panel, and the interlayer is filled with flame retardant materials by hot pressing.
2. Steel grade a fire door is made of high quality cold rolled plate, and is made of imported transfer adhesive and film. It has wooden texture, beautiful and elegant, and various styles.
3. Steel wood grade a fire door is made of steel and flame-resistant wood materials or flame-resistant wood products to make door frames, door leaf frames and door leaf panels. If the door leaf is filled with materials, it is filled with fire-proof heat barrier material, which is non-toxic and harmless to human body, and is equipped with doors with certain fire-resistant properties composed of fire-proof hardware accessories.
4. Other materials Grade A fire doors are made of inorganic non-combustible materials other than steel, flame-retardant wood or flame-retardant wood products or part of them are made of steel, flame-retardant wood and flame-retardant wood products. Door frames, door leaf frames, if the door leaf panel is filled with materials in the door leaf, it will be filled with fire-proof heat barrier material which is non-toxic and harmless to human body, and it will be equipped with fire-proof doors composed of fire-proof hardware accessories.
Class A fire door classification
1. Classification by number of doors: single fire door, double fire door and four fire doors;
2. Classification by opening method: flat open fire door and sliding fire door;
3. Classification according to the structure of door leaf: Glass-inlaid fire doors and non-glass-inlaid fire doors are made of laminated glass;
4. Classified by materials: wooden fireproof door, steel fire door, steel wooden fireproof door and other materials fire door.
Class A fire door Standard
Class A fire door specifications: except for the door opening size (GBJ2-73 & lt; Building unified modulus system & gt;) specified by the national unified modulus system for building doors and windows and openings, it can also be customized according to users' requirements. The specifications of Class A fire doors will be different for different buildings.
1. When the atrium area is larger than the fire partition in high-rise buildings: When the atrium and the corridor of the room are connected with doors and windows, the class a fire door should have the function of automatic closing, and the specification of Class A fire door is stipulated in Article 5.1.5.1 of the high standard. For the passage figured out with the atrium, the specification of Class A fire door should be set up in the hall as stipulated in Article 5.1.5.2 of the high regulations.
2. When the doors and windows on both sides of the firewall are less than 2 meters and the corner is less than 4 meters, the specification of Class A fire door is "high standard" 5.2.2.
3. For singing and dancing entertainment in high-rise buildings, the first floor or the second and third floors of the amusement park and other partition walls need to be opened, which should not be lower than the grade a fire door, at this time, the specification of Class A fire door is stipulated in Article 4.1.5 or article 5.1.15 of the high standard.
4. The doors from the front of the smoke-proof staircase to the staircase should use class a fire door specifications as stipulated in Article 6.1.3 of the high regulations.
5. In the basement and semi-basement staircase, the partition wall with fire resistance limit of not less than 2 hours should be adopted on the first floor. The specification of Class A fire door on the partition wall is stipulated in Article 6.2.8 of the high standard. Article 7.4.4 of the "Civil Air Defense regulations" and Article 5.2.2 of the "Civil Air Defense Regulations.
Fire protection limit of Class A fire door
The minimum fire protection limit of Class A fire door is 1.0 hours. The fire resistance limit of Class A fire door standard is slightly lower than that of class a fire door standard.
Class A fire door size
The thickness of steel plate of grade a fire door frame is 1.2mm, the thickness of steel plate of door leaf is 0.8mm, and the thickness of board fireproofing of Grade A rock wool board is 46mm, so the thickness of grade a fire door leaf is 48mm. The thickness of the fire glass on the class a fire door is 25mm.
The biggest advantage of fire doors is fire prevention. According to the fire resistance of fire doors, they can be divided into Class A, Class B and Class C fire doors. Fire doors are generally set in evacuation stairwells, fire zones and other places to protect people's safety. What are the material requirements for Class A fire door?
According to the new standard of fire doors, the values of fire resistance, heat insulation and integrity should be: Grade A 1.50h; Grade B 1.0h; Grade C should be 0.5h. However, Japan has stricter regulations on fire doors. They divide fire doors into Class A and Class B. The fire resistance limit of Class A fire doors should be 1.50-2.00h; Type-B fire door should be 0.50-1.50h. According to their code for fire protection design of buildings, fire doors are classified as Class A, Class B and Class C, and the minimum fire resistance limit of Class III fire doors is stipulated: Class A 1.20h, Class B 0.90h, grade C 0.60h, that is to say, the worst should meet these conditions.
2: According to regulations, grade a fire door is mainly made of steel, wood, steel wood and other materials. In addition, if the filling material is used in Class A fire doors, it is usually filled with perlite. If the difference between Class A fire protection is different, the thickness is only different. Some Class A fire doors are made of foam door core board, MC composite material, vermiculite board fireproofing and other fireproof material. The thickness of Class A fire door is generally 50mm, while the thickness of Class B rear door is generally 45mm, and the fire protection coefficient of Class A fire door is higher.
3: to judge the material of Class A fire door, what you need to know is that generally speaking, the material of Class A fire door is mainly divided into steel and wood, so there is a difference between steel fire door and wooden fireproof door, in fact, no matter what level of fire doors are divided into steel, wood, steel wood and other materials. These materials are common to all fire doors, not to say that the doors using these materials are Class A fire doors, but what is not used is not class a fire door, the main thing is to see which kind of fire door you want to buy. The reason why class a fire door is called class a fire door is that its fire resistance is not less than 1.2 hours.
