AS NZS 4610.2 pdf download

AS NZS 4610.2 pdf download.Furniture — School and educational Part 2: Chairs — Strength, durability and stability
1.3  Terms and definitions
For the purpose of this document, the following terms and definitions apply.1.3.1 accuracy degree of closeness to the true value or the specified value of whatever dimension is being measured, or force applied 1.3.2 accessible to the user features to which access can be easily gained by the user, when the seating is in its intended configuration for use, and for which the probability of unintentional contact is high 1.3.3 footrest chair component, for the purpose of providing a resting place for the user’s feet 1.3.4 height adjustable chairs that can be adjusted in height without the need for special tools and be set at a minimum of two adjacent dimensional size marks 1.3.5 may indicates the existence of an option 1.3.6 median plane vertical plane running from front to back and passing through the centre of the seat Note 1 to entry: See Figure 1.3.6.1.3.8 precision degree to which repeated measurements show the same results Note 1 to entry: Precision is usually expressed as a ± % about the true value or the specified value of whatever dimension is being measured, or force applied. 1.3.9 school chair measuring device SCMD device used for determining Point S, buttock zone and chair dimensions of chairs in accordance with EN 1729-1 1.3.10 shall indicates that a statement is mandatory 1.3.11 sharp edges edges that are not rounded, chamfered or otherwise finished such that they are smooth and free from burrs 1.3.12 shear and squeeze zones zones where the distance between two accessible parts, moving relative to each other, is less than 25 mm or more than 7 mm in any position during movement, or where parts move in classic scissor action without any gap between them 1.3.13 should indicates a recommendation 1.3.14 single-sloped seat seat sloped (in a general sense) either in a forward or rearward direction and confirmed with the SCMD Note 1 to entry: See Figures 1.3.14(A) and 1.3.14(B) .1.3.15 size mark marks have dual purposes and represent both — (a) alphabetic designation given to tables and chairs for the purpose of matching their heights to groups of users based upon ranges of user statures; and (b) level of strength, durability and stability testing appropriate to the user group. 1.3.16 stability ability of a chair to withstand overbalancing when forces are applied to it 1.3.17 static loading steady and gradual application, up to the maximum that the chair is required to withstand, of a loading repeated a sufficient number of times to test the static strength of the chair 1.3.18 stool chair without a backrest or with a back not higher than 100 mm above the seat loading point Note 1 to entry: Stools may be of any height and are often fitted with a footrest. Note 2 to entry: See tall chair (1.3.19). 1.3.19 tall chair chair or a stool higher than a sitting chair of the same dimensional size mark, and with a footrest Note 1 to entry: See Appendix B. 1.3.20 tolerance allowable difference from a specified value Note 1 to entry: Tolerance may be expressed as values or percentages. 1.3.21 transverse plane any vertical plane perpendicular to the median plane Note 1 to entry: See Figure 1.3.6.
1.4  General
1.4.1  Testing laboratories Other than for the requirements of measurement uncertainty, laboratories performing the tests outlined in this Standard shall meet the requirements of AS ISO/IEC 17025. NOTE  For example, accreditation bodies which are signatories to the International Laboratory Accreditation Cooperation (ILAC) Mutual Recognition Arrangement (MRA) for testing laboratories are able to offer accreditation against the requirements of AS ISO/IEC 17025. A listing of ILAC signatories is available from the ILAC website (www .ilac .org). In Australia and New Zealand, the National Association of Testing Authorities (NATA) and International Accreditation New Zealand (IANZ) are signatories to the ILAC MRA. 1.4.2  Materials Chairs shall be tested as supplied or as assembled. Where chairs are supplied other than fully assembled, clear and comprehensive assembly instructions shall be provided. The chair shall be assembled in accordance with the manufacturer’s instructions. Where the instructions allow assembly in different ways, the method determined most adverse shall be used. Fastenings shall not be re-tightened once testing has commenced.