Abstract: The acceptance standards for fire doors and windows are formulated by the fire department of the Ministry of Public Security, but many manufacturers have their own standards in the actual production and installation process. As a high-end building door system service provider in China, Nanjing Weiman Door Industry's products fully meet the needs of various fire doors in the commercial, civil, and industrial markets, providing customers with professional fire door installation services. During the construction process, compliance and legality are achieved to ensure the quality and quantity of fire engineering.

There are various acceptance standards for fire doors and windows, the most common of which are: acceptance standards for wooden fire doors, acceptance standards for steel fire doors, acceptance standards for fire windows, and so on. As fire doors and windows have industry-specific standards, manufacturers and consumers should pay attention to the acceptance of fire doors and windows. During the acceptance process, it is necessary to strictly follow the acceptance specifications for fire doors and windows to achieve the fire safety standards of the engineering project.

In the fire protection industry, there are several specific acceptance standards for fire doors, including:

Topic Content and Scope of Application

This standard specifies the product classification, specification dimensions, technical requirements, test methods, inspection rules, marking packaging, transportation and storage of wooden fire doors. This standard is applicable to fire doors that use wood or wood made openings as door handles, door frame, and door panel.

2. Reference standards

GB191 Packaging, Storage and Transportation Symbols GB5464 Test Methods for Non combustibility of Building Materials GB5823 Terminology for Building Doors and Windows GB5824 Dimensional Series for Opening and Closing of Building Doors and Windows GB5825 Sign Symbols for Opening and Closing Direction and Surface of Building Doors and Windows GB6388 Transport Packaging Shipping and Receiving Marks GB7633 Fire Resistance Test Methods for Doors and Rolling Shutters GB13685 Classification and Testing Methods for Wind Pressure Deformation Performance of Building External Doors and Wind Pressure GB13686 Code for Fire Protection Design of Buildings GBJ16 Code for Fire Protection Design of Buildings GBJ45 Code for Fire Protection Design of Tall Buildings GBJ206 Code for Construction and Acceptance of Wooden Structures GBJ210 Code for Construction and Acceptance of Decoration Engineering TJ9 Code for Load of Industrial and Civil Building Structures

3 Terminology, symbols, and codes

3.1 Wooden fire doors refer to doors that use wood or wood products as door frames, door frame frames, door panels, and have a fire resistance limit that meets the requirements of Article 4.4.1 of GBJ45.

3.2 The name symbol of wooden fireproof doors shall be gray MFM according to the provisions of GB5823.

4 Product classification, specifications and dimensions

4.1 Product Classification

Classified into Class A, Class B, and Class C wooden fire doors based on fire resistance limit

4.2 Specifications and Dimensions

The opening size and structural dimensions of wooden fire doors shall comply with the provisions of GB5824.

5 Technical Requirements

5.1 Materials

5.1.1 Wood

a. The selection criteria for wood should comply with the provisions of Table 2.

b. Wooden fire doors should be made of wood that has been dried using the cellar dry method, with a moisture content not exceeding 12%. When limited by conditions, except for easily deformable tree species such as Northeast larch, Yunnan pine, Masson pine, birch, etc., air dried wood can be used, and its moisture content during production should not exceed the local equilibrium moisture content.

5.1.2 Filling Materials

The filling material shall comply with the provisions of Article 7 of GB5464.

5.1.3 Glass

Glass should be made of products that do not affect the fire resistance performance test of wooden fire doors.

Grade I products are not allowed to have insect eyes, while Grade II products are allowed to have surface insect eyes.

If there are defects such as dead joints and large diameter insect holes within the allowable limit of 2 wooden fire doors, wooden plugs of the same tree species should be filled with glue. For oil products, the color and wood grain of the wooden plugs should be consistent with the mouth.

At the junction of wooden fire doors and the installation of small hardware, there shall be no knots or filled knots.

5.1.4 Hardware Accessories

Hardware accessories should be standardized and compatible products that have been tested and approved by national fire inspection agencies.

5.2 Wooden fire doors should be open and must be flexible in opening and closing (can be opened under a thrust of no more than 80N). And it has the function of self closing.

5.3 Wooden fire doors used for evacuation routes should have the function of quickly closing in the event of a fire, and should open in the direction of evacuation. They should not be equipped with locks or latches.

5.4 Double or multiple wooden fire doors with sub openings or multiple wooden fire doors must be able to close sequentially.

The gap width and allowable deviation for the installation of wooden fire doors should comply with the provisions of Table 3 and Table 4, respectively. The installation requirements should comply with the relevant regulations in 206.

5.6 A sealing groove should be left at the cutting edge where the wooden fireproof door overlaps with the door frame and leaf. And a sealing strip made of non combustible material is embedded.

5.7 Requirements for the production of wooden fireproof doors.

5.7.1 Door frames and door leaves with a thickness greater than 50mm should be connected with double tenons. When assembling frames and fans, the mortise and tenon joints should be tightly fitted, connected with adhesive material, and tightened with wedges. Note: In humid areas, Class I products should use water-resistant phenolic resin adhesive, while Class II products can use semi water-resistant urea formaldehyde resin adhesive.

5.7.2 When making plywood doors (including fiberboard doors), the frame and horizontal ribs must be on the same plane, and the surface layer, frame, and horizontal ribs should be pressure bonded. Two or more breathable holes should be drilled on the horizontal ribs and upper and lower protrusions to prevent moisture, delamination, or bulging.

5.7.3 The quality of door production shall comply with the following regulations:

a. The surface should be clean or sandblasted, and there should be no scratches, burrs, or hammer marks;

b. The line type of the frame and fan should meet the design requirements. Cutting corners and joints should be tight and smooth;

c. Small and short laminated doors, as well as plywood or fiberboard door leaves, do not come loose due to communication. Plywood is not allowed to penetrate the surface layer of veneer and parapet;

d. The allowable deviation for door production analysis should comply with the provisions of Table 5.

Note: Height and width dimensions, inner cut of frame, outer cut of fan.

5.7.4 When the conditions are met, it is advisable to assemble the door leaf and frame as a complete set, install all the small hardware, and then install them as a complete set. In general, the door frame should be installed first, followed by the door leaf.

5.7.5 After the wooden fireproof door is made, it should be immediately brushed with a layer of bottom oil

6.1 Height and width measurement: Measure the inner cut of the door frame and the outer cut of the door leaf.

6.2 Lifting measurement: Measure on one surface of the door leaf, determine a reference plane based on any three angles of that surface, and then measure the deviation value of the fourth angle relative to this reference plane.

6.3 Measuring tools can be steel tape measures, calipers, feeler gauges, or plug plates.

7 Test Methods

7.1 The determination of moisture content of wood used for wooden fire doors shall be carried out according to the method in Appendix III of GBJ206. The results shall comply with the provisions of Article 5.1.1b of this standard.

7.2 The determination of the opening force of wooden fire doors shall be carried out using digital display electronic force gauges or other force gauges, and the results shall comply with the provisions of Article 5.2 of this standard.

7.3 Sandbag impact test

7.3.1 Test object: The single or double leaf wooden fireproof door assembly includes hinges, door leaves, door frames, as well as connectors and other hardware used to connect the wall.

7.3.2 Test principle: Place a sandbag of a certain weight at a fixed height and use its potential energy to impact the center of the front of the sample door After a limited number of impacts, check the degree of damage to the door.

7.3.3 Test equipment: As shown in Appendix A (reference), it includes the following parts.

7.3.3.1 Adjustable test bench: The size of the test frame can be adjusted to accommodate the installation of wooden fire doors of different specifications and sizes. And it should have sufficient rigidity to avoid any deformation that may affect the test results during the testing process. The position of the pulley for suspending sandbags can be adjusted to ensure that the sandbag falls at a fixed height.

7.3.3.2 Sandbag: The total weight is 3.0kg. Including a circular leather bag with a diameter of 350mm and a loose capacity of 150o/m3 of sand. (The sand particle size is 1-2mm).

7.3.3.3 Other: ropes, pulleys, springs, and adjusting equipment.

7.3.4 Test Procedure

7.3.4.1 Pre test inspection: Check the integrity of the door, the firmness of the connectors, the flexibility of opening, and measure the deviation of each part.

7.2.4.2 Release the sandbag above the door and let it hit the front of the door leaf. Repeat this action a hundred times.

7.3.4.3 Conduct various tests before repeating the experiment.

7.3.5 Recording and Observation

a. Regarding the type, specifications, dimensions, materials used, hardware accessories, etc. of the sample door.

b. Number of sandbag impacts.

c. Initial position of sandbag.

e. All data tested before and after the experiment.

f. Experimental environment (temperature and relative humidity).

7.4 The fire resistance test shall be conducted in accordance with GB7633.

Note: For wooden fireproof doors with glass inlay. Where the glass area of each door exceeds 0.1m2. The temperature of the backside of glass should be measured according to the GB7633 measurement point arrangement method. If the glass area does not exceed 0.1m2, the temperature of the backside may not be measured.

For wooden fire doors with shiny glass. If the total area of the bright glass on it exceeds 0.5m2, the temperature of the back fire surface should be measured within 100mm of the center of the glass. If the total area of the glass exceeds 1.0m2, its thermal radiation intensity should also be measured simultaneously.

7.5 Wind pressure deformation performance test shall be conducted in accordance with GB13685.

7.6 Air permeability and rainwater permeability tests. According to GB13686.

Note: Tests 7.5 and 7.6 are only applicable to the exterior doors of buildings.

8.1 Delivery Inspection

8.1.1 Normal production inspection

a. The wood used for wooden fire doors should be selected by visual inspection according to the requirements of Article 5.1.la of this standard.

b. The wood required for each team's production should be sampled for moisture content determination according to the provisions of Article 7.1 of this standard as a batch.

c. For the filling materials, glass, and hardware accessories required for the production of wooden fireproof doors, the product identification certificate issued by the original manufacturer and tested by the national statutory testing department should be inspected.

d. Each wooden fireproof door should be inspected for its appearance quality, specifications, dimensions, and opening and closing flexibility. The allowable deviation for its production should comply with the provisions of Table 5.

8.1.2 The factory inspection shall repeat the inspection of each item specified in Article 8.1.1d of this standard for each wooden fire door.

8.2 Formal Inspection

8.2.1 In any of the following situations, the product shall be subject to formal inspection by the statutory testing department.

a. Trial production and finalization identification of new or old products during factory transfer production

b. The product has significant changes in structure, process, materials, and other aspects

c. Periodic inspection during normal production, once every four years

d. When the product is discontinued for one year and production resumes.

8.2.2 The type inspection items for wooden fire doors include the 11 items specified in Chapter 5 of this standard. The inspection sequence shall be in accordance with Article 5.2, Article 5.3, Article 5.4, Article 5.5, Article 5.6, Article 5.7, Article 5.8, Article 5.9, Article 5.10, Article 5.11, and Article 5.12.

8.2.3 Sampling and Judgment Rules

8.2.3.1 Two samples shall be selected as sealed samples for inspection by batch sampling from products that have passed the factory inspection. The test piece shall not be attached with any excess spare parts or subjected to special assembly processes or improvement measures. If it is a specially made sample door, it should be noted in the testing report.

8.2.3.2 If one of the two sample doors passes the inspection, this batch of doors is considered a qualified product.

If the first formal inspection fails, another sampling inspection is allowed. In the second sampling inspection, two doors should pass the inspection, and this batch of doors is considered qualified.

9 standards and factory certificates, packaging, transportation, and storage

9.1 Signs and Factory Certificates: Wooden fire doors must have permanent signs and nameplates prominently displayed. Please indicate the manufacturer, product name, fire resistance rating, product code, and date of manufacture.

When issuing a loan, the factory inspection report must be sent to the user along with the delivery note. It should be noted that:

a. Certificate number;

b. Name and address of the manufacturing plant;

c. Product name, grade, specifications, quantity, and production date;

d. Product performance inspection results;

e. The inspection department and inspectors of the production plant sign and stamp.

9.2 Packaging

The packaging of wooden fireproof doors can be tied with grass ropes or packed in boxes. The packaging box should comply with the provisions of GB191 and GB6833. The door leaf must not come into direct contact, and it is strictly prohibited to stack heavy objects on the door.

9.3 Transportation

The transportation of wooden fireproof doors should comply with the regulations of the railway, highway, shipping, and air transportation departments. During transportation, it is necessary to tie it tightly. It is not allowed to squeeze or collide, and there should be rain and moisture proof signs. During loading and unloading, it is strictly prohibited to touch, drop, or pry.

9.4 Storage and transportation

Wooden fire doors should be stored in warehouses or open sheds to prevent exposure to sunlight and rain. When stored, it should be placed flat or standing sideways on a wooden pad, and the height of the pad should be greater than 400mm from the ground. The warehouse should maintain ventilation.