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GB/T 3324-2024: General technical requirements for wooden furniture Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 3324: Historical versions
GB/T 3324-2024: General technical requirements for wooden furniture---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT3324-2024GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 97.140 CCS Y 80 Replacing GB/T 3324-2017 General technical requirements for wooden furniture Issued on. OCTOBER 26, 2024 Implemented on. MAY 01, 2025 Issued by. State Administration for Market Regulation; National Standardization Administration. Table of ContentsForeword... 4 1 Scope... 7 2 Normative references... 7 3 Terms and definitions... 9 4 Categories... 11 5 Requirements... 11 5.1 Main dimensions and their deviations... 11 5.2 Shape and position tolerances... 13 5.3 Material requirements... 14 5.4 Appearance requirements... 15 5.5 Physical and chemical properties... 17 5.6 Mechanical properties... 19 5.7 Structural safety (basic item)... 20 5.8 Limited amount of hazardous substances (basic items)... 21 5.9 Electrical safety (basic item)... 21 5.10 Flame retardancy (basic item)... 21 6 Test methods... 21 6.1 Determination of main dimensions and their deviations... 21 6.2 Shape and position tolerance measurement... 21 6.3 Material determination... 23 6.4 Appearance determination... 23 6.5 Determination of physical and chemical property... 24 6.6 Mechanical performance test... 27 6.7 Structural safety... 28 6.8 Limited content of hazardous substances... 28 6.9 Electrical safety... 28 6.10 Flame retardancy... 28 7 Inspection rules... 28 7.1 Inspection classification... 28 7.2 Exit-factory inspection... 29 7.4 Rules for determining test results... 31 7.5 Re-inspection rules... 31 8 Marking, instructions for use, packaging, transportation and storage... 31 8.1 Marking... 31 8.2 Instructions for use... 31 8.3 Packaging... 32 8.4 Transportation and storage... 32 Appendix A (Normative) Main parts and product classification of wooden furniture 33 A.1 Main components of wooden furniture... 33 A.2 Classification by main components of the product... 33 A.3 Classification by surface finish of main parts of the product... 33 A.4 Products are classified by use occasion... 34 Appendix B (Normative) Annual average timber balanced moisture content in provinces (districts, special zones), municipalities, major cities... 35 Appendix C (Informative) Standards for commonly used wood-based panels and wood for furniture name... 37 References... 391 ScopeThis document stipulates the requirements, inspection rules and markings, instructions for use, packaging, transportation and storage of wooden furniture; describes the corresponding test methods; defines terms and definitions; gives classifications. This document is applicable to the quality control of wooden furniture design, production, sales services, inspection and testing.2 Normative referencesThe contents in the following documents constitute an indispensable clause in this document through normative references in the text. Among them, only the version corresponding to the date is applicable to this file; the latest version (including all modifications) of the reference files without the date is applicable to this file. GB/T 250 Textiles - Tests for color fastness - Grey scale for assessing change in color GB/T 1043.1 Plastics - Determination of Charpy impact properties - Part 1.Non- instrumented impact test GB/T 1927.4-2021 Test methods for physical and mechanical properties of small clear wood specimens - Part 4.Determination of moisture content GB/T 2828.1-2012 Sampling procedures for inspection by attributes - Part 1. Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection GB/T 3920-2008 Textiles - Tests for color fastness - Color fastness to rubbing GB/T 4893.1-2021 Test of surface coatings of furniture - Part 1.Determination of surface resistance to cold liquids GB/T 4893.2-2020 Test of surface coatings of furniture - Part 2.Determination of resistance to wet heat GB/T 4893.3-2020 Test of surface coatings of furniture - Part 3.Determination of resistance to dry heat GB/T 4893.4-2023 Test of surface coatings of furniture - Part 4.Determination of adhesion - Cross cut GB/T 4893.7-2013 Test of surface coatings of furniture - Part 7.Determination of surface resistance to alternation of heat and cold GB/T 4893.8-2023 Test of surface coatings of furniture - Part 8.Determination of wearability3 Terms and definitionsThe terms and definitions defined in GB/T 28202-2020, as well as the following terms and definitions, apply to this document. 3.1 Wooden furniture Except for decorative parts and accessories among the main parts of furniture, the rest are made of wood and other wood materials. 3.2 Solid wood furniture The wooden furniture whose main components are made of solid wood materials, with a surface that has been veneered (or not) solid wood veneer or thin wood (veil) and has been (or not) painted. Solid wood materials include logs, solid wood sawn timber, finger joints, integrated materials and other materials. 3.3 Wood-based panel furniture Panel furniture The wooden furniture whose main components are made of wood-based panels such as fiberboard, particleboard, plywood, wooden board, laminated materials, etc. 3.4 Solid wood and wood-based panel furniture The wooden furniture whose product frames are made of solid wood, whilst the panels or inner panels of the frame are made of decorative wood-based panels. [Source. GB/T 28202-2020, 2.14, modified] 3.5 Wooden furniture made of multiple materials Wooden furniture, which is made of various wooden materials, but cannot be defined as solid wood furniture, panel furniture, and other wooden furniture. 3.6 Outward appearance External visual surface in the initial state of the product. 3.7 Inward appearance The visual surface displayed by the opening of moving parts such as product doors and drawers, partitions or shelves, etc. 3.8 Surface decoration Decoration treatment which is carried out using coating, covering, edge sealing and other processes on the surface or edges of wooden parts of furniture. Note. The coating process includes scraping, brushing, wipe, pouring, rolling, extracting, dipping, spraying, air spraying, airless spraying, electrostatic spraying and other processes.4 CategoriesThe main components and product classification of wooden furniture are in Appendix A.5 Requirements5.1 Main dimensions and their deviations The main dimensions and their deviations shall comply with the requirements of Table 1. 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 Test methods6.1 Determination of main dimensions and their deviations The test piece shall be placed on a flat panel or flat ground and measured using a steel ruler or tape measure with accuracy of no less than level II. The dimensional deviation is the difference between the product identification value and the measured value. 6.2 Shape and position tolerance measurement 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. 6.3 Material determination 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 Determination of physical and chemical property 6.5.1 Physical and chemical properties of paint film coating 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. 6.5.4 Physical and chemical property test of plastic parts 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 Inspection rules7.1 Inspection classification Inspections are divided into exit-factory inspection and type inspection. 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. 7.2.3 Judgement rules 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.8 Marking, instructions for use, packaging, transportationand storage 8.1 Marking Product markings shall include at least the following. 8.2 Instructions for use The preparation of product instructions shall be in accordance with the provisions of GB/T 5296.6; the content shall at least include. 8.3 Packaging The product shall be packaged to prevent bumps, scratches, debris. 8.4 Transportation and storage Products shall be stacked flat during transportation and storage; necessary protection shall be provided to prevent pollution, insect erosion, moisture, exposure to the sun. During storage, it shall be stacked separately according to category, specification, grade. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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