1、 Reference number ISO 21016:2007(E) ISO 2007INTERNATIONAL STANDARD ISO 21016 First edition 2007-07-01 Office furniture Tables and desks Test methods for the determination of stability, strength and durability Mobilier de bureau Tables et bureaux Mthodes dessai pour la dtermination de la stabilit, de
2、 la rsistance et de la durabilit ISO 21016:2007(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer
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5、tral Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2007 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permissio
6、n in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2007 All rights reservedI
7、SO 21016:2007(E) ISO 2007 All rights reserved iii Contents Page Foreword iv 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 2 4 General test conditions 2 5 Test apparatus 5 6 Test methods. 5 7 Test report . 14 Annex A (informative) Guidance for the choice of cycles, forces and height
8、s for the stability, strength and durability tests . 15 ISO 21016:2007(E) iv ISO 2007 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is norm
9、ally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in t
10、he work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare
11、 International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some
12、 of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 21016 was prepared by Technical Committee ISO/TC 136, Furniture. INTERNATIONAL STANDARD ISO 21016:2007(E) ISO 2007 All rights reserved 1 Office
13、furniture Tables and desks Test methods for the determination of stability, strength and durability 1 Scope This International Standard specifies test methods for the determination of the stability, the strength and the durability of all types of office tables designed for use in the seated and/or s
14、tanding position, e.g. work tables, height-adjustable tables, meeting tables and desks. It applies to tables that are fully assembled and ready for use. This International Standard does not contain test methods for storage elements, which can be found in ISO 7170. The tests consist of the applicatio
15、n, to various parts of the unit, of loads, forces and velocities simulating normal functional use, as well as misuse, that can reasonably be expected to occur. With the exception of the deflection of table tops, the tests are designed to evaluate properties without regard to materials, design/constr
16、uction or manufacturing processes. The test results are valid only for the unit/component tested. These results can be used to represent the performance of production models provided that the tested model is representative of the production model. Tests carried out according to this International St
17、andard are intended to demonstrate the ability of the item to give satisfactory service in its intended environment. It is necessary to understand that such tests do not ensure that structural failure will not eventually occur as a result of habitual misuse or after an excessively long period of ser
18、vice. The tests have been developed for units/components that have not been in use. However, when properly justified, they can be used for fault investigation. This International Standard specifies test methods only. It does not specify requirements. These should be specified in a requirements docum
19、ent. If this is not available, suggested forces and cycles can be found in Annex A. Assessment of ageing and degradation is not included. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited app
20、lies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 7619-2:2004, Rubber, vulcanized or thermoplastic Determination of indentation hardness Part 2: IRHD pocket meter method ISO 7170:2005, Furniture Storage units Determination of strength
21、 and durability ISO 21016:2007(E) 2 ISO 2007 All rights reserved3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 clear height distance between the top of the extension element bottom and the lower edge of the extension element above, or the st
22、ructure of the unit NOTE See Figure 1. Key 1 structure of unit 2 clear height Figure 1 Clear height 3.2 duty cycle length of time the height-adjustable tables drive system can be operated without impairing its useful life NOTE The duty cycle includes the amount of time the drive system can be operat
23、ed and the amount of time it must not be operated to allow the drive system to cool sufficiently before it is activated again. 4 General test conditions 4.1 General Forces, velocities, masses, dimensions, angles, time and temperatures given in this International Standard shall be targeted at the nom
24、inal values specified. 4.2 Preliminary preparation Pre-assembled table(s) shall be tested as delivered. The unit(s)/component(s) shall be assembled and/or configured according to the instructions supplied with them. The most adverse configuration intended for use shall be used for each test. If moun
25、ting or assembly instructions are not supplied, the assembly method shall be recorded in the test report. Fittings shall be tightened before testing and shall not be retightened unless specifically required by the manufacturer. If it is necessary to change the configuration to produce the worst- cas
26、e conditions, this shall be recorded in the test report. The tests shall be carried out in indoor ambient conditions. If during a test the temperature is outside of the range of 20 C 5 C, the maximum and/or minimum temperature shall be recorded in the test report. ISO 21016:2007(E) ISO 2007 All righ
27、ts reserved 3 For furniture that includes hygroscopic materials, at least one week in normal indoor conditions shall have elapsed between manufacture (or assembly) and testing. The test for deflection of table tops (see 6.7), except those made from metal, glass and stone, shall be carried out at a r
28、elative humidity of (50 5) %. If during a test the relative humidity is outside this range, the maximum and/or minimum shall be recorded in the test report. NOTE (50 5) % RH and the corresponding wood moisture content is representative of average indoor conditions in Canada, Europe and the USA. Othe
29、r relative humidities can be appropriate in other parts of the world. In the case of designs not addressed in the test procedures, the tests shall be carried out as far as possible as described and any deviation shall be recorded in the test report. Unless otherwise specified, levelling devices shal
30、l be opened to their midpoint of adjustment, but not more than 10 mm. Before beginning the testing, visually inspect the unit thoroughly. Record any defects so that they are not assumed to have been caused by the tests. Carry out measurements if specified. During testing, the unit shall be placed on
31、 the floor and levelled, unless otherwise specified. 4.3 Test equipment Unless otherwise specified, the tests may be applied by any suitable device because results are dependent only upon correctly applied forces and loads and not upon the apparatus. The equipment shall not inhibit deformation of th
32、e unit/component during the test. It shall be able to move so that it can follow the deformation of the unit/component during testing, so that the forces and loads are always applied at the specified point and in the specified direction. All loading pads shall be capable of pivoting in relation to t
33、he direction of the applied force. The pivot point shall be as close as practically possible to the load surface. 4.4 Application of forces The forces in the static force tests shall be applied sufficiently slowly to ensure that negligible dynamic force is applied. Unless otherwise specified, each f
34、orce shall be maintained for a period of (20 10) s. The forces in durability tests shall be applied at a rate to ensure that excessive heating does not occur. Unless otherwise specified, each force shall be maintained for a period of (2 1) s. The forces may be applied using masses. The relationship
35、of 10 = 1 kg shall be used. 4.5 Tolerances Unless otherwise stated, the following tolerances are applicable: forces: 5 % of the nominal force; velocities: 5 % of the nominal velocity; masses: 1 % of the nominal mass; dimensions: 1 mm of the nominal dimension; angles: 2 of the nominal angle. The accu
36、racy for the positioning of loading pads shall be 5 mm. ISO 21016:2007(E) 4 ISO 2007 All rights reserved4.6 Sequence of testing All applicable tests shall be carried out on the same sample and in the same sequence as they appear in this International Standard. All tests specified for a particular co
37、mponent shall be carried out on the same sample. 4.7 Prevention of movement during test If a unit tends to slide or roll during the tests specified in Clause 6, the unit shall be restrained by stops (see 5.2). 4.8 Loads in storage components Unless otherwise specified, all components, including exte
38、nsion elements, intended for storage purposes shall be uniformly loaded according to Table 1. The volume of extension elements shall be calculated as the internal area of the extension element bottom multiplied by the clear height above it. Table 1 Loads in storage components Part Load Shelves 1,5 k
39、g/dm 2Storage components for suspended filing only a4,0 kg/dm All other storage components 0,5 kg/dm 3aDimension measured perpendicular to the plane of the suspended file pockets. 4.9 Inspection and assessment of results After completion of each of the tests, visually inspect the unit again. Record
40、any changes that have taken place since the initial inspection (see 4.2). Inspection may include measurements, e.g. opening or closing forces or deflections. The inspection shall note at least the following: a) fracture of any component or joint; b) loosening of any joint intended to be rigid, that
41、can be demonstrated by hand pressure; c) deformation or wear of any part or component such that its functioning is impaired; d) loosening of any means of attachment; e) any wear or deformation of a component that can affect its stability. Pass and fail criteria should be established in a requirement
42、 document. ISO 21016:2007(E) ISO 2007 All rights reserved 5 5 Test apparatus 5.1 Floor surface The floor surface shall be a rigid, horizontal and flat surface. For the strength under horizontal static force test (see 6.3), the surface shall be a smooth high-pressure plastic laminate or a smooth stee
43、l. For the durability of tables with castors (see 6.8), the test shall be carried out on a smooth steel surface. For the drop test (see 6.9), the floor shall be faced with a 3 mm thick layer of rubber with a hardness of (85 10) IRHD in accordance with ISO 7619-2. 5.2 Stops Devices shall be used to p
44、revent the table from sliding or rolling but not tilting. They shall be no higher than 12 mm except in cases where the design of the table necessitates the use of higher stops, in which case the lowest that prevents the table from moving shall be used. When a stop with a height greater than 12 mm is
45、 used, the height shall be recorded in the test report. 5.3 Loading pad The loading pad is a rigid disc, 100 mm in diameter, with a flat face and a 12 mm front edge blend radius. 5.4 Masses Masses shall be designed so that they do not reinforce the structure or redistribute the stresses. 6 Test meth
46、ods 6.1 Stability 6.1.1 Stability under vertical load Place the table on the floor surface (see 5.1). The test shall be carried out with the storage components unloaded and closed. Tables that can be set to heights both above and below 950 mm shall be tested to both 6.1.1.1 and 6.1.1.2. 6.1.1.1 Test
47、 for tables that are or can be set to a height of 950 mm or less The table shall be set to the height most likely to overturn the table, but not more than 950 mm. The specified vertical force shall be applied to the table top through the loading pad (see 5.3) 100 mm from the edge at the point most l
48、ikely to overturn the table. If the position most likely to cause overturning is not apparent, it can be necessary to carry out this test with the vertical force at additional locations on the table top. Record whether the table overturns. ISO 21016:2007(E) 6 ISO 2007 All rights reserved6.1.1.2 Test
49、 for tables that are or can be set to a height greater than 950 mm The table shall be set to the height most likely to cause overturning, but not less than 950 mm. Apply 50 % of the specified vertical force to the table top through the loading pad (see 5.3) 100 mm from the edge at the point most likely to overturn the table. If the position most likely to cause overturning is not apparent, it can be necessary to carry out this test with the vertical force at additional locations on
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