Fire door specification fire door classification
In the fire protection, the classification of the fire door level is clearly defined. After the new standard is introduced, some adjustments are made to the original fire door level. The classification of fire doors is classified according to the classification of insulated fire doors, and is classified into insulated fire doors (Class A), departmental insulated fire doors (Class B) and non-insulated fire doors (Class C); The fire resistance of the original Class A, B and C fire doors was adjusted to 1.5h, 1.0h and 0.5h, which greatly enhanced the types of fire door products in China and increased the choice of practical applications. For applications where thermal insulation or fire integrity requirements are required, departmental insulated or non-insulated fire doors may be used.
Class A fire door
Class A fire doors, also known as fully insulated fire doors, can meet the requirements of fire resistance and fire integrity at the same time within the specified time. The fire resistance grades are 0.5h (Grade C), 1.0h (Grade B), 1.5. h (grade A) and 2.0h, 3.0h.
Class B fire door
Class B fire doors, also known as partially insulated fire doors, have a fire and heat insulation requirement of 0.5 h and fire integrity levels of 1.0 h, 1.5 h, 2.0 h, and 3.0 h, respectively.
Class C fire door
Class C fire doors are also called non-insulated fire doors. They are not required for fire resistance and heat insulation. They only meet the requirements of fire integrity during the specified refractory time. The fire integrity grades are 1.0h, 1.5h and 2.0h respectively. , 3.0h. In the British BS standard, there is the content of non-insulated fire doors.
GB16809-2008 "fire window" standard specifies the naming, classification and code, specifications and models, technical requirements, test methods, inspection rules, signs, packaging, transportation and storage of fire window products, suitable for lighting function in buildings. Steel fire windows, wooden fire windows and steel-wood composite fire windows, other fire windows can also be implemented.
The new standard corresponds to the fire door standard to modify the relevant fire resistance performance parameters of the fire window. Compared with the 97 version of the standard, the main changes are as follows: the scope of application of the standard has been expanded; the classification method of fire resistance of fire windows has been modified with reference to international and foreign standards, according to "insulation (Class A)" and "non-insulation (C Class)" was classified and added five fire resistance grades from 0.5h to 3.0h; the modeling method of fireproof windows was clarified; the quality requirements and test methods of fireproof glass used on fireproof windows were added; fire windows were added Technical requirements and test methods for wind resistance and airtightness, distortion of movable window sash, static operating temperature of heat sensitive components of movable fire windows, sash closing reliability, automatic closing time of window sash, and modified type inspection of fire windows Sampling methods and criteria. "Fire protection specifications for high-rise civil building design" requirements for fire door installation In the high-rise building fire protection design, in addition to the role of ordinary doors, fire doors also have special functions of fire prevention, smoke separation, suppression of fire spread, and protection of personnel evacuation.
Fireproof wooden door production requirements
Production requirements for wooden fire doors:
1) Door frames and door fans with a thickness greater than 50mm shall be connected by double turns. When the frame and fan are assembled, the gutter should be tightly fitted, glued with rubber, and tightened with rubber wedges. Note: In wet areas, Class I products should be water-resistant phenolic resin glue, and Class II products should be semi-water resistant urine aldehyde resin glue.
2) When making plywood doors (including fiberboard doors), the frame and the horizontal sill must be on the same plane, and the surface layer and the frame and the traverse should be pressure bonded. More than two venting holes should be drilled in the cross and upper and lower to prevent moisture degumming or creping.
3) The quality of the door shall meet the following requirements:
(1) The surface should be clean or frosted, and there should be no shading, burrs and hammer marks.
(2) The line shape of the frame and fan should meet the design requirements, and the cutting angle and joint seam should be strictly flat.
(3) Small and short material glued doors and plywood or fiberboard door fans are not allowed to be degummed. Plywood is not allowed to be cut through the veneer and enamel.
(4) The allowable deviation of door production shall comply with the provisions of Table 5.1-1.
4) When the conditions are met, it is advisable to assemble the door leaf and the frame, install all the hardware, and then install it in a complete set. In general, the door frame should be installed first, then the door leaf should be installed.
5) After the wooden fire door is made, the base oil (dry oil) should be brushed once to prevent moisture deformation.
6) The installation of door hardware should meet the following requirements:
(1) The hardware should be fully installed, suitable for location, and reliable.
(2) The upper and lower ends of the hinge should be 1/10 of the height of the vertical, and avoid the upper and lower heads. The switch should be flexible after installation.
(3) The hardware should be fixed with wood screws, and should not be replaced with nails. It should be hammered into the 1/3 depth first, then screwed in. It is strictly forbidden to enter the full depth. When using hardwood, drill a 2/3 depth hole with a hole diameter of 0.9 times the diameter of the wood screw.
(4) It is not advisable to install a door lock at the junction between the head and the head.
(5) The door handle should be below the height of the door, and the door handle should be 0.9~1.05m away from the ground.
Construction and installation requirements:
1. The wooden fire door should be a swing door, which must be opened and flexible, and has the function of self-closing.
2. The wooden fire door used for the evacuation passage should have the function of being able to close immediately in the event of fire, and it should be opened in the direction of evacuation. It is not suitable to install locks and bolts.
3. Double or multiple wooden fire doors with sub-ports must be able to be closed in sequence.
4. The door of the wooden fire door should be sealed with a groove at the door of the door, and a sealing strip made of incombustible material should be inlaid.
5. When the conditions are met, it is advisable to assemble the door leaf and the door frame, install all the hardware, and then install them in a complete set.
6. After the wooden fire door is made, the base oil (dry oil) should be brushed once to prevent moisture deformation.
7. Small hardware installation should be fixed with wood screws, and should not be replaced with nails.
Fire-retardant treatment requirements for wood and wood-based panels for wood fire doors
Fire regulations such as "Code for Fire Protection of Building Design" stipulate that firewalls must use non-combustible or non-combustible materials; "Code for Fire Protection Design of Interior Decoration of Buildings" stipulates that non-combustible or non-combustible materials must be used for wall decoration of all buildings except ordinary houses.
As a part of the firewall, wooden fire doors should be fire-retardant materials in addition to the fire resistance limit. The "General Technical Conditions for Wooden Fire Doors" does not have any requirements for the facing materials of the door.
Article 3 of the Supplementary Rules for Type Approval of Steel and Wood Fire Door Products stipulates that wooden fire door manufacturers must be equipped with wood flame retardant treatment equipment. However, due to the fact that some manufacturers have not carried out flame retardant treatment in the technical documents submitted at the time of factory certification and type inspection and certification, there is a recognition that when fire doors are produced using broad-leaved trees, the wood does not need to be flame-retarded. This formulation is extremely harmful to the quality supervision of wooden fire doors and fair market competition. It can be said with certainty that the wood is not treated with flame retardant and no fireproof coating or non-combustible material is used for protection. The fire end of the fire door is certainly not up to the requirements of Class A fire doors. The basis is as follows: the average burning speed of wood used in the calculation of wood structure strength in Europe is 0.7mm/min for structural wood, 0.5mm/min for hardwood for interior decoration materials, 0.6mm/min for softwood (the fire surface is vertical) ), the wood burning rate of wood used in Japanese architectural design is 0.6mm/min. The thickness of the fire door door frame material is usually about 35mm, calculated at a burning carbonization rate of 0.6mm/min, and burned completely in 60 minutes. When the fire door is tested, it has a positive pressure and at the same time bears its own weight. When the thickness of the wood is less than 10mm, the fire door will lose its integrity and heat insulation. The author used a fire door made of untreated ash wood, the fire resistance limit was 47min. According to Japanese data, when the structure and thickness of the door are the same as those of the domestic wooden fire door, the fire end of the fire door made of untreated wood meets the requirements of 0.5h, and the fire end of the fire door made of flame retardant laminated material meets the 1.0h. Requirements.
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