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What are the grades of fire doors? Code requirements for fire doors


1. Size and specification of fire door

In simple terms, the size of fire doors is generally the following empirical figures:

Single leaf fire doors are 900mm (1000) X2100mm (2200, 2300)

Double fire doors are 1200mm (1500, 1800, 2100) X2100mm (2200, 2300)

According to the width and height of the door body, it can be divided into single-leaf, double-leaf and double-leaf door. According to the requirements of fire door specifications and related documents, the maximum width of single-leaf door is 1000mm, and the maximum width of double-leaf door is 2100mm. About 1200mm; in terms of height, the maximum size is currently 2300mm according to the fire door specification.

The specifications are relatively fixed are fire-resistant entrance doors and steel-wood fire-resistant doors. These two products are mainly used for home entry and office doors. There are mainly 950mm*2050mm and 1150mm*2050mm sizes, and the manufacturing and installation are relatively uniform.

Ordinary wooden fire doors, stainless steel fire doors and fire glass doors are mostly custom-made sizes. At present, the domestic requirements are that the maximum width is 2100mm, and the height does not exceed 2300mm, and it must be determined according to the fire door inspection report obtained by the fire door manufacturer.

The conventional size of steel fire doors is also within 2123. For the parts of super large fire door openings, fire door factories that meet the manufacturing conditions approved by the state can produce steel super large fire doors. What needs to be reminded is that there are few domestic enterprises that can manufacture super doors There are very few, and users must purchase from qualified oversized fire door manufacturers.

2. Fire door rating

Class A fire doors

Class A fire doors are also known as fully insulated fire doors, which can meet the requirements of fire resistance and heat insulation and fire integrity at the same time within the specified time. h (Class A) and 2.0h, 3.0h.

Because the fire protection effect achieved is different, the use position is also different. Class A fire doors are generally used for power distribution room, boiler room, and water pump room; Class B fire doors are used for equipment rooms with fixed fire extinguishing systems, fire control rooms, air-conditioning machine rooms, and stairways; Class C fire doors are used for hydropower wells and ordinary tube wells.

Class B fire doors

Class B fire doors are also called partial heat insulation fire doors. The fire resistance and heat insulation requirements are 0.5h, and the fire resistance integrity levels are 1.0h, 1.5h, 2.0h, and 3.0h.

Class C fire doors

Class C fire doors are also known as non-insulated fire doors, which have no requirements for fire resistance and heat insulation. They only meet the requirements of fire integrity within the specified fire resistance time, and the fire integrity levels are 1.0h, 1.5h, and 2.0h respectively. , 3.0h. In the British BS standard, there are non-insulated fire doors.

3. The difference between fire doors and security doors

1. Definition

Fire doors: The main purpose is to prevent fire and have strong fire resistance. Therefore, the selected materials must be highly resistant to fire and high temperature. Not only does it not release toxic gases, but it can also block the entry of toxic gases.

Anti-theft door: The full name is anti-theft safety door, which has both anti-theft and safety performance. Anti-theft door can be made of different materials, but only the door that meets the standard inspection and receives the security product production certificate can be called anti-theft door.

2. Function

The main function of the anti-theft door is that the anti-prying and airtight performance is relatively good. Generally, after the door is closed, the door cannot be opened without a key.

The main function of the fire door is to prevent fire and block poisonous gas, and the thickness of the door steel plate also has different requirements.

3. Filling material

The filling inside the fire door is a special fire-proof, temperature-insulating and flame-retardant material. The sealing strip uses a fire-proof expansion sealing strip, which can expand when exposed to high temperature to block smoke.

The inside of the anti-theft door is mainly to support the steel frame and soundproof cardboard. The sealing rubber strip is also an ordinary rubber strip, which does not have the effect of blocking smoke. The wider door frame is wrapped with a certain thickness of steel plate.

4. Fire door selection

1. Fire door size

The external dimensions of qualified products should be less than or equal to the external dimensions in the sample description, the thickness of the door leaf should be greater than or equal to the door leaf thickness in the sample description, the width of the side wall of the door frame should be greater than or equal to the width of the door frame side wall in the sample description, and the external dimensions of the fireproof glass should be less than or equal to the sample The dimensions of the fire-resistant glass in the description, and the thickness of the fire-resistant glass should be greater than or equal to the thickness of the fire-resistant glass in the sample description.

2. Fire door seal

Usually, there will be a seal after the fire door is installed. Qualified steel and wooden fire safety doors should be equipped with a fire seal. The seal should be straight, without arching, and have a qualified test report issued by a national testing agency.

3. Appearance of fire doors

The high-quality steel fire doors are firmly welded, and the solder joints are evenly distributed; the outer surface is sprayed flat and smooth; there should be product marks, fire safety door quality inspection marks and quality certification (approval) marks at the specified positions; , you can focus on observing and selecting these details.

4. Fire door hardware

3 hinges are used for doors with a height greater than 1800mm, and 2 hinges are used for doors with a height less than 1800mm; one door closer is installed for a single-leaf door, and two door closers are installed for a double-leaf door. The better it is, the better the sealing performance of the fire door will be.

5. Fire door sign

Each fire door should have a permanent sign in a conspicuous position, and the sign should include the following contents: product name, model specification and trademark; manufacturer name or manufacturer mark and factory address; date of manufacture and product production batch number; implementation standards, etc.

6. Fire door price

The price of fire doors is affected by different regions, transportation, door closers, installation, grades and materials, and the price difference is still quite large. Generally, the price of a class A and B fire door is 250 to 400 yuan per square meter, while that of class C is relatively cheaper.

5. Fire door installation

Find the rules by springing the thread → handle the door opening → check the embedded parts of the door opening → unpack and check the quality of the door → transport to the installation location according to the drawing number → install the anti-theft door → caulk around the door and window, fill the insulation → clean up → quality inspection → product protection

1. Find the rules by playing the thread

Find the edge of the door and window on the highest floor, lead the edge of the door and window to each floor with a large thread pendant, and draw and mark the door and window of each floor, and deal with some irregular openings. High-rise buildings can use theodolite to draw vertical lines.

The elevation dimension of the door opening is based on the floor + 50cm horizontal line and turned upwards, so that the installation elevation position of the door can be found.

2. Installation position in the direction of wall thickness

According to the size of the external wall and the width of the window sill, determine the installation position of the anti-theft door. During installation, the exposed width of the window sill in the same room should be mastered.

3. Fixed with the wall

(1) According to the position of the design drawing, pop the door installation position line in the hole, and specify the elevation size of the door installation.

(2) According to the position of the expansion bolt on the outer frame of the door, drill expansion bolt holes on the wall at the corresponding position of the hole.

(3) Install the door on the installation line of the hole, adjust the verticality, elevation and diagonal length of the door, and fix it with wooden wedges after passing the test.

(4) The door and the opening are fixed with expansion bolts and covered with a screw cover.

(5) The gap between the door and the opening shall be compacted according to the material required by the design, and the surface shall be sealed with building sealant.

6. Fire door monitoring system

The fire door monitoring system can monitor the opening and closing status of the fire door 24 hours a day. In the event of a fire, adjust the releaser and door closer after receiving the action command from the monitor to meet the requirements of personnel escape, fire prevention, smoke prevention, and on-site fire command. Therefore, the fire door status information of the evacuation passage must be fed back to the fire control room or the fire door monitoring host with 24-hour personnel on duty.

Working principle of fire door monitoring system

Use the monitoring module to monitor the status of the fire door in real time, and feed back the signal to the host. In the event of a fire, the smoke detector or other sensors sense the occurrence of a fire. After the information is calculated and processed, the host computer sends an instruction to the electric door closer, and the electric door closer implements the door closing action.

Fire door monitoring system specification

National Standard "Code for Fire Protection Design of Buildings"

National Standard "Fire Door Monitor"

National Standard "Code for Design of Automatic Fire Alarm System"

National standard "Code for construction and acceptance of fire shutters, fire doors, and fire windows"

National Standard "General Technical Requirements for Fire Control Room"