GB/T 10357.1-2024 Test of mechanical properties of furniture –
Part 1: Strength and durability of tables
1 Scope
This document describes test methods for strength and durability of tables.
This document is applicable to the inspection, testing and evaluation of mechanical properties of tables.
This document is not intended for infant care desks.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 10357.5-2023 Test of mechanical properties of furniture - Part 5: Strength and durability of storage units
ISO 2439:2008 Flexible cellular polymeric materials - Determination of hardness [indentation technique]
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
duty cycle
time for adjusting the drive system of the height-adjustable table without compromising the service life
[Source: GB/T 38607- 2020, 3.2, modified]
3.2
end extension
extended tabletops that exceed the length of the original tabletop by 200 mm or higher and are not directly supported by the ground
3.3
levelling device
device with adjustable range less than 40 mm in the vertical direction and capable of keeping the tabletop horizontal
3.4
type I tables
tables with a tabletop area greater than 0.5 m2 and a height over 600 mm
3.5
type II tables
tables other than type I tables
4 General test conditions
4.1 Pretreatment and test environment
The test piece shall be a completely assembled product.
Detachable furniture shall be completely assembled according to the drawing requirements; if there are several combinations, it shall be assembled in the most unfavorable way for strength test and durability test.
If the manufacturer does not provide the installation or assembly instructions of furniture, the assembly method shall be recorded in the test report.
All hardware connectors shall be securely installed before testing. It shall not be tightened again during the test, unless otherwise specified by the manufacturer.
During the test, the tabletop shall be adjusted to level, and the leveling device shall be adjusted to the middle position without exceeding 13 mm (from the fully closed position).
Unless otherwise specified by the manufacturer, the test pieces shall be placed in an indoor environment without load for at least 24 hours before testing.
The test shall be conducted in an indoor environment. If the temperature during the test exceeds the range of 15 °C ~ 27 °C, the maximum and minimum temperatures shall be recorded in the test report. For the test of desktop deflection (see 6.7), except those made of metal, glass and stone, other tables shall be tested in an environment with relative humidity of 40% ~ 70%. If the humidity exceeds the range of 40% ~ 70% during the test, the maximum and minimum humidity shall be recorded in the test report.
Before the test, the whole test piece shall be visually inspected completely, and any existing defects shall be recorded to distinguish the defects caused by the test.
4.2 Loading force
Forces in static loads shall be applied slowly enough to avoid dynamic loading.
Unless otherwise specified, each force shall be maintained for 10 s ~ 15 s.
The force in the durability test shall be maintained at a fixed frequency during application to avoid excessive heat. Unless otherwise specified, each force shall be maintained for (2 ± 1) s.
Force may be substituted by weights. The substitution relationship is 10N = 1 kg.
4.3 Tolerances
Unless otherwise specified, the following tolerances apply to this document:
—Force: ±5% of the nominal force;
—Mass: ±1% of nominal mass;
—Size: If it is less than 200mm, the deviation shall be ±1mm of the nominal size, and the deviation of other sizes shall be ±0.5%;
—The deviation between the loading position of the loading pad and the impactor shall be ± 5mm.
Note: Due to the measurement uncertainty, the test results are considered unaffected provided that the above tolerances can be reached.
4.4 Sequence of testing
All strength tests shall be carried out on the same test piece in the order of the chapters in this document, and durability tests may be carried out on different test pieces.
All component-specific tests shall be carried out on the same test piece.
4.5 Loading of storage components
Unless otherwise specified, in the strength and durability test, all storage components not under test, such as push-pull members, shall be uniformly loaded according to Table 1. Moving parts not under test shall remain closed during the test.
The volume of push-pull member is calculated as the internal bottom area × clear height and expressed by cubic decimeters (dm3).
Contents
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 General test conditions
4.1 Pretreatment and test environment
4.2 Loading force
4.3 Tolerances
4.4 Sequence of testing
4.5 Loading of storage components
5 Test equipment and facilities
5.1 General
5.2 Impactor
5.3 Ground
5.4 Stops
5.5 Loading pad
5.6 Foam pad
5.7 Durability test surface of caster
5.8 Durability test stop of caster
5.9 Foam pads for glass testing
5.10 Type I test weight
5.11 Type II test weights
6 Test procedure
6.1 General
6.2 Horizontal static load test
6.3 Vertical static load test
6.4 Horizontal durability and structural strength test
6.5 Vertical durability test
6.6 Vertical impact test
6.7 Desktop deflection test
6.8 Durability test of table casters
6.9 Drop Test
6.10 Durability test of lifting mechanism
6.11 Durability test of folding structures
6.12 Other components
7 Inspection and result assessment
Annex A (Normative) Provisions for test level and test load, number of cycles and height
A.1 Test level and test load, number of cycles, height
A.2 Selection of test level
Annex B (Normative) Recommended deformation and deflection value requirements
Bibliography
