ISO INTERNATIONAL STANDARD 7174-2 First edition 1992-10-01 Furniture --- Chairs -- Determination of stability -- Part 2: Chairs with tilting or reclining mechanisms when fully reclined, and rocking chairs Chaises - Determination de la stabilite - Partie 2: Chaises inclinables ou avec mecanisme d'inclinaison complete jusqu'en position de chaise longue, et chaises a bascule Reference number ISO 7174-2:1992(E) Not for Resale ISO 7174-2:1992(E) Foreword IsoO (the International Organization for Standardization) is a worldwide federation of national standards bodies (Iso member bodies). The work of preparing International Standards is normally carried out through Iso which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with isO, also take part in the work.IsO collaborates closely with the International Electrotechnical Commission (lEC) on all matters of electrotechnical standardization Draft International Standards adopted by the technical committees are national Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard IsO 7174-2 was prepared by Technical Committee isO/TC 136,Furniture, Sub-Committee SC 1,Test methods. Iso 7174 consists of the following parts, .under the general title Furniture -- Chairs --- Determination of stability: Part 1: Upright chairs and stools Part 2: Chairs with tilting or reclining mechanisms when fully re- clined, and rocking chairs Annex A of this part of IsO 7174 is for information only. C IsoO 1992 All rights reserved. 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 permission in writing from the publisher. International Organization for Standardization Case Postale 56 : CH-1211 Geneve 20 : Switzerland Printed in Switzerland Copyright International Organization for Standardization Not for Resale INTERNATIONAL STANDARD ISO 7174-2:1992(E) Furniture -- Chairs -- Determination of stability Part 2: Chairs with tilting or reclining mechanisms when fully reclined. and rocking chairs tion of the standard indicated below. Members of Scope IEc and ISo maintain registers of currently valid International Standards. mining the rearward stability of chairs with tilting, IS07174-1:1988,Furniture Chairs- - Determination reclining and adjustable back angle mechanisms of stability -- Part 1: Upright chairs and stools. when they are fully tilted or reclined, and of rocking chairs. 3 Definition Forward and sideward stability of these chairs and of upright chairs is determined by methods de- For the purposes of this part of IsO 7174, the follow- scribed in ISO 7174-1. This part of 1sO 7174 de- ing definition applies. scribes test methods only for the rearward stability of chairs whenfully tilted or reclined,and should not 3.1 stability: Ability to withstand forces that tend to be considered as an alternative test for upright cause the article to overturn. (IsO 7174-1:1988) chairs. The test results are only valid for the article tested. 4 Representation of test person When the test results are intended to be applied to other similar articles,the test specimen should be The test methods are representative of a person representative of the production model. sitting with arms stretched out or behind the head and legs under the chair, which is considered to be In the case of designs. not catered for in the test the configuration of the human form most likely to procedures, the test is to be carried out as far as cause instability in chairs possible as described, and deviations from the test procedure recorded in the test report. The test apparatis represents a person of 110 kg mass and a stature of 190 cm; therefore the test al- NOTE 1 This international Standard is one of a series lows for normal dynamic loads generated by per- being prepared on th