GB/T 10357.4-2023 PDF English
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Test of mechanical properties of furniture - Part 4: Stability of storage units
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| GB/T 10357.4-2013 | English | 70 |
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Test of mechanical properties of furniture -- Part 4: Stability of storage units
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| GB/T 10357.4-1989 | English | 185 |
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Test of mechanical properties of furniture--Stability of storage units
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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.
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