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GB/T 10357.4-2023 PDF English


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GB/T 10357.4-2023English405 Add to Cart 0-9 seconds. Auto-delivery. Test of mechanical properties of furniture - Part 4: Stability of storage units Valid
GB/T 10357.4-2013English70 Add to Cart 0-9 seconds. Auto-delivery. Test of mechanical properties of furniture -- Part 4: Stability of storage units Obsolete
GB/T 10357.4-1989English185 Add to Cart 0-9 seconds. Auto-delivery. Test of mechanical properties of furniture--Stability of storage units Obsolete
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GB/T 10357.4-2023: PDF in English (GBT 10357.4-2023)

GB/T 10357.4-2023 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 97.140 CCS Y 80 Replacing GB/T 10357.4-2013 Test of Mechanical Properties of Furniture - Part 4: Stability of Storage Units (ISO 7171:2019, Furniture - Storage Units - Test Methods for the Determination of Stability, MOD) ISSUED ON: SEPTEMBER 7, 2023 IMPLEMENTED ON: APRIL 1, 2024 Issued by: State Administration for Market Regulation; Standardization Administration of the People’s Republic of China. Table of Contents Foreword ... 3 Introduction ... 7 1 Scope ... 8 2 Normative References ... 8 3 Terms and Definitions ... 8 4 General Test Conditions ... 9 5 Test Equipment and Facilities ... 11 6 Test Steps ... 12 7 Test Report ... 24 Appendix A (informative) Guidelines for the Selection of Loads and Forces for Stability Test of Storage Units ... 26 Appendix B (normative) Loads and Forces for Stability Test of Storage Units ... 27 Appendix C (informative) Principle for the Selection of Test Methods ... 29 Test of Mechanical Properties of Furniture - Part 4: Stability of Storage Units 1 Scope This document describes the test methods for the stability of storage units. This document is applicable to cabinet (the storage type) furniture that has been assembled and ready for use. 2 Normative References The contents of the following documents constitute indispensable clauses of this document through the normative references in the text. In terms of references with a specified date, only versions with a specified date are applicable to this document. In terms of references without a specified date, the latest version (including all the modifications) is applicable to this document. GB/T 10357.5 Test of Mechanical Properties of Furniture - Part 5: Strength and Durability of Storage Units 3 Terms and Definitions The terms and definitions defined in GB/T 10357.5 and the following are applicable to this document. 3.1 overturn The state, in which, an untethered product cannot return to its normal upright position. 3.2 height adjustment device A device used to make a certain component of a product height adjustable. EXAMPLE: a certain component like a work surface. 3.3 TV-furniture A storage-type furniture product used or designed to support televisions, television monitors and similar objects. 3.4 bracket A rigid support device to prevent overturn. NOTE: it is usually made of metal, not a flexible device like a belt or a cable tie. 4 General Test Conditions 4.1 Pre-treatment Products to be tested shall be intactly assembled and deliverable finished products. The product and its components shall be assembled and / or configured in accordance with the instructions provided. Unless otherwise stated, the tests shall be performed in the configuration that is least conducive to the mechanical properties. If assembly or configuration instructions are not provided, then, the assembly or fitting-together method shall be recorded in the test report. Before the tests, fittings shall be tightened, and shall not be tightened again during the test when there are no special requirements in the manufacturer's instructions. If changes in product configuration are required to simulate the worst-case scenario, then, this shall be recorded in the test report. Unless otherwise specified by the manufacturer, before the tests, the unit shall be placed without load for at least 24 hours under indoor environmental conditions. The test shall be carried out on the test ground. The unit shall be leveled, and the leveling device shall be set in the middle position, but it shall not be more than 13 mm from the fully closed position. The units used for installation on buildings shall only be tested in accordance with 6.7. If the test cannot be carried out in accordance with the stipulations of this document, then, it shall be close to the stipulations. Any deviations from the test methods specified in this document shall be technically assessed and recorded in the test report. 4.2 Loading Force The speed of static load application shall be slow, so as to ensure that the additional dynamic load is small enough to be ignored. Unless otherwise specified, each load specified to be applied shall be maintained for 10 seconds ~ 15 seconds. When loading, the force value can be replaced by the mass of the weights. The conversion uses the relations 10 N = 1 kg. Appendix A provides guidelines for the selection of loads and force values, etc. for the tests. Appendix B specifies the loads and force values. Appendix C explains the principle for the selection of test methods included in this document. 4.3 Tolerances 5 Test Equipment and Facilities 5.1 Unless otherwise specified, any applicable test equipment can be used for tests, because the test results only depend on whether the applied force is correct and not on the test equipment itself. The test equipment shall not hinder the deformation of the units, that is, during the tests, the test equipment shall be able to move with the movement of the units, so as to ensure that the load is always in the specified position and direction. 5.2 Ground: a hard, level and flat surface. 5.3 Wall surface: it shall be hard, vertical and flat. 5.4 Stops: used to prevent the units from sliding but cannot restrict the units from overturn. The height of the stops shall be the lowest height that just prevents the units from moving. 5.5 Mass: the applied mass shall not enhance the unit structure, nor shall it change the stress distribution of the units. 5.6 Load of suspended filing pockets: paper or similar substitutes shall be used for loading. 5.7 Spherical objects: for example, glass beads with a diameter of 10 mm ~ 15 mm, which shall be loosely packed into a large flexible bag, so as to allow them to move in the bag during the tests. NOTE: loose means the bag is about 50% filled. 5.8 Loading pad: a rigid disc with a diameter of 100 mm and an edge rounding radius of 12 mm. The loading surface is a flat surface. If the space is limited, a loading pad with a diameter of 50 mm can be used. 5.9 TV formworks: two frames or boxes with the shape shown in Figure 1 and the dimensions shown in Table 2, which are capable of supporting loads acting through their center of gravity. The unloaded mass shall be (10  0.2) kg. The center of gravity of the unloaded formworks shall be the geometric center of the unloaded formworks. The change in the position of the center of gravity of the loaded formwork and the position of the center of gravity of the unloaded formwork shall be limited to within 5 mm. During the tests, the formworks shall be kept in the initial position. Apply the vertical downward force specified in Table B.1 to the front panel of the opened extension element or the centerline position 50 mm away from the outer edge of the opened opening door or flap. For TV-furniture with both extension elements and opening doors, force shall be successively applied to each component. In accordance with the stipulations of Table B.1, assemble additional loads on the unloaded TV formworks and repeat the above-mentioned test procedures. Record whether the TV-furniture overturns or is supported by opened extension elements, opened doors or opened flaps, and whether the TV formworks overturn. During the test, if the TV-furniture is prevented from overturn due to opened extension elements, opened opening doors or opened flaps, then, these components shall be closed, and the test shall be re-performed. 6.8.4 Stability of TV-furniture with doors and / or extension elements closed---with storage components unloaded All storage components shall be unloaded. All doors and extension elements shall be fully closed. Place the unloaded TV formworks at the straight center 150 mm from the front edge of the TV- furniture (see Figure 12). Apply the horizontal outward-tilting moment at the point most likely to cause the units to overturn. In accordance with the stipulations of Table B.1, assemble additional loads on the unloaded TV formworks, and repeat the above-mentioned test procedures. Record whether the TV formworks overturn. 7 Test Report The test report shall at least include the following content: a) Serial No. of this document; b) Laboratory name and address; c) Test location (if different from laboratory address); d) Unique identification of the test report, including the identification on each page and the identification at the end of the test report; e) Consignor’s name and address; f) Description and confirmation of units, such as: product type, “name” and photos, etc.; g) The state of the units when received, such as: pending installation, installed and defective, etc.; Appendix A (informative) Guidelines for the Selection of Loads and Forces for Stability Test of Storage Units A.1 Principle This Appendix aims at providing guidance to those who wish to specify the stability requirements for storage units. Appendix B provides recommended loads and forces applicable to the stability test of household and non-household cabinets. These loads and forces, etc., are used in this test method, or to facilitate in the development of a document of requirements. Appendix C provides the purpose and applicability of the stability test methods for storage units included in this document. A.2 Requirements The loads and forces specified in Appendix B cover all application scenarios of storage units, as well as differences caused by different usage modes in different application scenarios. The stipulations of Appendix B are used in accordance with the design purpose of storage units. In accordance with scientific principles, users may choose test parameters and requirements specified for them. When carrying out the test in accordance with this document using the requirements in Appendix B (depending on the scope of application), it is recommended that the units shall not overturn. If the units are prevented from overturn by opened extension elements, opened opening doors or opened flaps, then, the stability requirements are not satisfied, unless the purpose is to prevent overturn. Appendix C (informative) Principle for the Selection of Test Methods C.1 Purpose This Appendix aims at providing the applicability of the test methods in this document. Please refer to the relevant chapters in the test methods. C.2 All Doors, Extension Elements and Flaps Closed, with All Storage Components Unloaded C.2.1 Test of units with a height of or adjustable to  1,000 mm (6.2.1) This test aims at evaluating how an unloaded unit with a height of  1,000 mm can bear a vertical load on the top without overturn. For example, when a person sits on the top edge of the unit. C.2.2 Test of units with a height of or adjustable to > 1,000 mm (6.2.2) This test aims at evaluating how an unloaded unit with a height of > 1,000 mm can bear a vertical load and horizontal outward force on the top without overturn. For example, when a person leans against the side of the unit. C.3 All Opening Doors, Extension Elements and Flaps Opening Test, with All Storage Components Unloaded (6.3) This test aims at evaluating how an unloaded unit can bear the horizontal outward force corresponding to the opening force of the opening doors, extension elements or flaps without overturn, while maintaining the worst-case opening doors and the rear extension elements opened or flaps in the open state. C.4 Opening doors, Extension Elements and Flaps Opened and Unlocked C.4.1 All opening doors, extension elements and flaps opened and unloaded, with all storage components unloaded (6.4.1) This test aims at evaluating whether an unloaded unit overturns when all opening doors, extension elements or flaps are opened. C.4.2 Opening doors, extension elements and flaps opened and loaded, with all storage components unloaded (6.4.2) This test aims at evaluating whether an unloaded unit can bear the vertical force on the outer edge of the opened opening doors, opened extension elements or opened flaps when all remaining opening doors, one extension element or one flap are opened on the same vertical line. For example, a person opens other extension elements under the support of a door. C.4.3 Opening doors, extension elements and flaps opened and loaded, with all storage components loaded (6.4.3) This test aims at evaluating whether a loaded unit can bear the vertical force on the outer edge of the opened opening doors, opened extension elements or opened flaps when all remaining opening doors, one extension element or one flap are opened on the same vertical line. For example, a person opens other extension elements under the support of a door. C.4.4 Topmost extension element opened and loaded, with some storage components loaded (6.4.4) This test aims at evaluating the stability of a unit with one or more extension elements and equipped with an interlocking device. For example, a person attempts to open one extension element while the other is already open. C.5 All Locked Opening Doors, Extension Elements and Flaps Loaded in the Opening Direction, with All Storage Components Loaded (6.5) This test aims at evaluating how a locked loaded unit can bear a horizontal outward force exerted on a handle or knob without overturn. For example, a person attempts to open a locked cupboard. C.6 Dynamic Stability Test of Units with Casters (6.6) This test aims at evaluating how a loaded unit with casters can bear dynamic forces without overturn when hitting an obstacle. For example, when a person moves a cupboard with casters and hits a threshold. C.7 Strength Test of Anti-overturn Device (6.7) This test aims at evaluating how a well installed safety device designed to prevent overturn can bear outward horizontal forces. C.8 Additional Stability Test for TV-furniture C.8.1 Stability of TV-furniture with doors and / or extension elements open (6.8.3) This test aims at evaluating whether a loaded TV-furniture can bear the vertical force on the outer edge of opened opening doors, opened extension elements or opened flaps when all remaining opening doors, extension elements or flaps are closed. For example, a person stands up while being supported by an open component. C.8.2 Stability of TV-furniture with doors and / or extension elements closed---with storage components unloaded (6.8.4) This test aims at evaluating the capability of an unloaded TV-furniture in bearing horizontal ......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.