GB/T 3324-2024General technical requirements for wooden furniture (English PDF)

5.3 Material requirements

5.3.1 Wood moisture content (basic item) The wood shall be dried and the wood moisture content shall be 8% ~ (the annual average wood balance moisture content in the product area +1%). The annual average timber balanced moisture content of all provinces (autonomous regions, special zones), municipalities and major cities in China is in accordance with Appendix B.

5.3.2 Consistency between marking and physical objects (basic item) The product marking, quality card, instructions for use, and express statements in the sales contract shall be consistent with the wood, wood-based panel and its use parts used in the product. See Appendix C for the standard of material name.

5.3.3 Requirements for wood-based panel materials (contract requirements or arbitration inspection requirements) Wood-based panels and decorative wood-based panels shall be inspected and judged according to the standards agreed in the contract. See Appendix C for commonly used wood-based panel standards.

5.4 Appearance requirements The appearance requirements shall comply with the provisions of Table 3.

5.5 Physical and chemical properties

5.6 Mechanical properties The mechanical properties of wooden furniture are shown in Table

6.Special test conditions and requirements can be agreed upon by the supplier and the buyer and stated in the contract.

5.7 Structural safety (basic item) It shall comply with the corresponding provisions of GB 28008-2024.

5.8 Limited amount of hazardous substances (basic items) It shall comply with the corresponding provisions of GB 18584-2024.The testing of formaldehyde, benzene, toluene, xylene, total volatile organic compounds (TVOC) is only applicable to indoor wooden furniture products.

5.9 Electrical safety (basic item) The electrical part in the product shall comply with the relevant provisions of GB 44246-2024.

5.10 Flame retardancy (basic item) The soft cladding in the product shall comply with the relevant provisions of GB 17927- 2024.

6.2.1 Warpage Warpage determination instrument with an accuracy of no less than

0.1 mm is used. Select the panel with the most severe warpage; place the instrument on the diagonal line of the panel for measurement; use the maximum distance as the measured value of warpage.

6.2.2 Flatness A flatness measurement device with an accuracy of no less than

0.01 mm is used. Select 3 panels with the most severe unevenness; measure the distance between the reference line within a length of 0 mm ~ 150 mm on their surface; use the maximum distance as the flatness measurement value.

6.2.3 Adjacent edge perpendicularity Use a steel ruler or steel tape measure with accuracy of no less than level II, to measure the two diagonal lines and opposite sides of the rectangular panel or frame; the difference is the measurement value of the adjacent side perpendicularity.

6.2.5 Parting The measurement is performed using a feeler gauge with an accuracy of no less than

0.01 mm. Before measurement, the drawer or door shall be opened and closed 3 times, to keep the drawer or door in the closed position.

6.2.6 Foot stability Place the test piece on a flat plate or on a flat ground; use a feeler gauge with an accuracy of no less than

0.01 mm, to measure the distance between the foot or bottom surface and the flat plate; record the maximum value as the measured value.

6.2.7 Sag and swing Determination is carried out using a steel ruler or steel tape measure with an accuracy of no less than level II. Place the steel ruler or steel tape measure on the horizontal plane and side adjacent to the measurement part of the test piece. Extend the test piece out of two-thirds of the total length.

6.4 Appearance determination

6.4.1 Wood insect worm Use naked eyes to carefully check whether there are live insects or eggs or insect- bearing powder in the wood material.

6.4.2 Decolorization, color fading Check 3 positions on the outer surface or inner coating parts of the product. Use a wet degreased white gauze with bare hands to wipe back and forth three times.

6.5.2 Physical and chemical performance test of cladding (flexible and overlaid)

6.5.2.1 Testing location Generally, it can be used on the surface of the product horizontal components.

6.5.2.2 Hot & cold cycle resistance According to the provisions of

4.40 in GB/T 17657-2022, the number of test pieces is 3.

6.5.2.10 Light-resistant color fastness The length and width of the specimen shall be determined by the shape and size of the equipment specimen holder; the blue wool cloth is level

6.It is performed according to the provisions of

4.31 in GB/T 17657-2022.

6.5.3 Physical and chemical property test of glass parts

6.5.3.1 Heat shock resistance The measurement is performed according to the method described in

6.5 in GB/T 32446-2024.

6.5.3.2 Surface dry heat resistance The measurement is performed according to the method described in

6.5 in GB/T 32446-2024.

6.5.5 Physical and chemical property test of flexible cladding

6.5.5.1 Friction resistance color fastness Textile fabrics and artificial leather are measured according to the method described in GB/T 3920-2008.

6.5.5.2 Textile fabric pH The determination is performed according to the method described in GB/T 7573-2009.

6.5.5.3 Leather pH The determination is performed according to the method described in QB/T 2724-2018.

6.5.5.4 Adhesion firmness of genuine leather and film leather (moving film leather) coatings The measurement is performed according to the method described in GB/T 39452-2020. Samples are taken on the seat or back of the sample, or samples can also be taken on the same material as the sample.

6.5.6 Corrosion resistance test of metal handles The determination is performed according to the method described in QB/T 3826-1999.

6.6 Mechanical performance test

6.6.1 Strength and durability of tables It is performed according to the provisions of GB/T 10357.1.The test level is selected according to the applicable conditions; the test level 2 is generally selected.

6.6.2 Strength and durability of chair and stool Chair and stools are in accordance with the provisions of GB/T 10357.3.The test level is selected according to the applicable conditions; the test level 3 is generally selected.

6.6.9 Bunk bed stability It is performed in accordance with the provisions of GB/T 24430-2023.

6.7 Structural safety It is performed in accordance with the provisions of GB 28008-2024.

6.8 Limited content of hazardous substances It is performed in accordance with the provisions of GB 18584-2024.

6.9 Electrical safety The electrical safety in the product is carried out in accordance with the provisions of No.1 in Table A.1 of GB 44246-2024.

6.10 Flame retardancy It is performed in accordance with the provisions of GB 17927-2024.

7.2 Exit-factory inspection

7.2.1 Exit-factory inspection items Exit-factory inspection is the inspection of non-destructive items performed by the product when it is exit-factory or when it is delivered, including the following items.

7.2.2 Sampling and batch grouping rules Exit-factory inspections are subject to random sampling inspection. The sampling inspection plan is based on the provisions of GB/T 2828.1-2012.Use the normal inspection and one-time sampling, general inspection level II, the reception quality limit (AQL) 6.5.

7.3 Type Inspection

7.3.1 Inspection items All items in Chapter 5 except contract requirements and arbitration inspection shall be included.

7.3.2 Inspection timing During formal production, inspection shall be carried out regularly. Type inspection shall be carried out in one of the following situations.

7.3.3 Sampling rules During one inspection cycle, 2 pieces (sets) of samples are randomly selected from the same qualified batch of products with exit-factory inspection, of which 1 piece (set) is sent for inspection and 1 piece (set) is sealed.

7.3.4 Inspection procedures Follow the principle that does not affect the accuracy of subsequent inspection items.

7.4 Rules for determining test results In the type inspection items, all basic items shall be in compliance; if there are no more than 4 noncompliant items in general items, the product will be evaluated as a qualified product. Those that are below the requirements of qualified products are unqualified products. If all randomly taken samples are qualified according to 7.3.3, the type inspection of this batch of products will be determined to be qualified.

7.5 Re-inspection rules If the product fails the type inspection, it can be re-inspected once for the same batch of samples (including sealed samples). The re-inspection item is the noncompliant items in the first inspection or the uninspected items due to sample damage. It shall be evaluated in accordance with the provisions of 7.4; the "re-inspection" shall be indicated in the inspection results. Customized furniture without similar products will no longer be tested.