© ISO 2015 Alpine ski bindings — Selection of release torque values Fixations de skis alpins — Sélection des valeurs du couple de déclenchement INTERNATIONAL STANDARD ISO 8061 Fourth edition 2015 12 1[.]
INTERNATIONAL STANDARD ISO 8061 Fourth edition 01 5-1 -1 Alpine ski-bindings — Selection of release torque values Fixations de skis alpins — Sélection des valeurs du couple de déclenchement Reference number ISO 8061 : 01 (E) I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n © ISO 01 ISO 8061:2 015(E) COPYRIGHT PROTECTED DOCUMENT © ISO 2015, Published in Switzerland All rights reserved Unless otherwise speci fied, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission Permission can be requested from either ISO at the address below or ISO’s member body in the country of the requester ISO copyright office Ch de Blandonnet • CP 401 CH-1214 Vernier, Geneva, Switzerland Tel +41 22 749 01 11 Fax +41 22 749 09 47 copyright@iso.org www.iso.org ii I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n © ISO 2015 – All rights reserved ISO 8061: 015(E) Contents Page Foreword iv Introduction v Scope Symbols Release force Weight method 4.1 Calculation of release torques 4.2 Release torques corresponding to user’s maximum recommended mass 4.3 Correction of the release torque Annex A (normative) Definition of skier type © ISO 01 – All rights reserved I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n iii ISO 8061:2 015(E) Foreword ISO (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 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 the work ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part In particular the different approval criteria needed for the different types of ISO documents should be noted This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part (see www.iso.org/directives) Attention is drawn to the possibility that some 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 Details of any patent rights identi fied during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents) Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement For an explanation on the meaning of ISO speci fic terms and expressions related to conformity assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers to Trade (TB T) see the following URL: Foreword - Supplementary information The committee responsible for this document is ISO/TC 83 , equipment, Subcommittee SC 4, Snowsports equipment Sports and other recreational facilities and This fourth edition cancels and replaces the third edition (ISO 8061:2004), which has been technically revised to remove Annex B It also incorporates the Amendment ISO 8061: 200 4/Amd 1: 2006 iv I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n © ISO 01 – All rights reserved ISO 8061: 015(E) Introduction T his I nternational Standard is one of a series of I nternational Standards deal ing with the s afety of ski b i n d i n gs ; the o the r I n te r n ati o n a l S t a nd a rd s o f th i s s e r i e s a re I S O a n d I S O National s tandards , complying with legal regu lations , may b e more exten s ive regarding, for example, the fo l l o w i n g: — c o m b i ne d l o ad i n g ; — de f lexion of the ski I n te r n atio n a l S ta n d a rd s c o ve r i n g the s e a s p e c t s a re b e i n g p re p a re d To veri fy the s afety of ski-bindings , it is neces s ar y to use al l three I nternational Standards of the series and also national s tandards covering as p ec ts which are not yet s tandardi zed international ly © I S O – Al l ri gh ts re s e rve d I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n v I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n INTERNATIONAL STANDARD ISO 8061:2 015(E) Alpine ski-bindings — Selection of release torque values Scope This International Standard speci fies methods for the selection of the release torques for alpine skibindings It gives information necessary to determine the release torques; these are to be recommended for use by ski-binding manufacturers in their instructions for installation and use, and by ski shops for the adjustment of already mounted ski-bindings I t ap p l i e s to a lp i ne s ki- b i nd i n gs i n c u r re nt u s e I t m i ght b e i n ap p ro p r i ate fo r no n- me ch a n ic a l b i nd i n gs o r b i nd i n gs u s e d w i th b o o t s wh ich re ach mo re than half-way up the lower leg Manufacturers may use either of the two speci fied methods, or a combination of the two, as the basis fo r the i r re co m me nde d re le a s e to rque s The methods apply to torque-measuring binding test machines If force-measuring test machines are used, it is necessary to report the release force, calculated as shown in C l au s e In recommending the release torques, it is necessary to take into account the abilities of the skier concerned by applying skier-type correction factors For this purpose, three types of skier are de fined, a s de s c r i b e d i n A n ne x A Symbols S e e F i g u re z FО, MО s₁ x FМ, MМ y s₂ FН, MН Figure — Symbols All i m a g i n ab l e lo ad s on the s ki bo ot can be re fe r re d system of coordinates, and a moment of rotation M to as fo rc e F ac ti n g a lo n g the x y , , or z a xe s of a ab o u t th at a x i s The origin of the system of coordinates is fixed at approximately the bottom of the boot sole T he to r que s a nd fo rc e s s ho w n in F i g u re a re p o s i ti ve To rque s a nd fo rc e s in the o p p o s i te d i re c ti o n s a re ne gati ve © I S O – Al l ri gh ts re s e rve d I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n ISO 8061:2 015(E) Release force The release force, = F r Fr, in newtons, is given by Formula (1): M (1) l where M l is the release torque, in newton metres; is the lever arm, in metres (i.e the distance from the point of force application by the test machine to the point about which the boot or plate pivots) The value of l should be determined empirically by measuring Fr for several values of M Weight method 4.1 Calculation of release torques 4.1.1 A range of release torques based on the mass of the skier can be calculated from the formulae given in 4.1 to 4.1 for both twist release, Mz, and forward lean release, My Ski-binding manufacturers shall not recommend release torques higher than the upper limit of this range; they may recommend torques below the lower limit Manufacturers may provide additional information to guide the fitter and user in the selection of such values 4.1.2 a) The upper limit for Mz, in newton metres, is given by Formula (2) and Formula (3): if the mass of the skier is less than 70 kg: Mz = ,84 m2 ⋅ m s + Nm s b) (2) if the mass of the skier is equal to or greater than 70 kg: Mz = ,69 m2 ⋅ m s + 15 Nm s (3) where ms 4.1.3 a) The lower value for Mz, in newton metres, is given by Formula (4) and Formula (5): if the mass of the skier is less than 75 kg: Mz is the mass of the skier, in kilograms = ,71 m2 s2 I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n ⋅ ms (4) © ISO 01 – All rights reserved ISO 8061: 015(E) b) if the mass of the skier is equal to or greater than 75 kg: Mz = ,59 m2 ⋅ m s + Nm s (5 ) where m 4.1.4 s is the mass of the skier, in kilograms M y M z ( ,6 = 4.2 My, in newton metres, is given by Formula (6): ,006 Nm M z ) The release torque + (6) Release torques corresponding to user’s maximum recommended mass If the actual mass of the skier is greater than the maximum recommended mass for his height, the release torque values shall be calculated using the maximum recommended mass, given by Formula (7): m T, max for = m T, max , h , then which is 100 ( h − ) (7 ) h ≥ 1,50 m, where h is the height of the skier, in metres 4.3 Correction of the release torque 4.3 The recommended release torque values shall be corrected for skier-type (see Annex A) respectively) (see 4.3 and 4.3 , and age The result may be eventually lowered or raised upon request of the skier (see 4 and ) 4.3 The skier-type correction factor should be as follows: — for skier type 1: –15 % for M and My; M and My z — for skier type 2: 0; — for skier type 3: +15 % for 4.3 z The age correction is determined as follows: — skiers under 10 years: –15 % for M z and My; — skiers in the age of 50 years and older: –15 % for 4.3 a) b) M z and My Release torque values other than recommended above may be used in the following cases Skiers who have satisfactory experience with lower settings regarding these recommendations may request settings based on their experience Skiers who have skiing experience without inadvertent releases may request a setting up to 15 % lower than recommended above c) Skiers having certain characteristics like neutral skiing technique, defensive attitude, high degree of control, etc may request a setting up to 15 % lower than recommended above © ISO 01 – All rights reserved I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n ISO 8061:2 015(E) d) S kiers who have exp erienced inadver tent releas es may reques t a setting up to % higher than re c o m me n de d ab o ve 4.3 Skiers may request settings that are different for twist and forward lean 4.3 I f the skier’s style requires greater corrections than indicated ab ove, the skier may change the s e tti n g at h i s o wn ri s k I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n © I S O – Al l ri gh ts re s e rve d ISO 8061: 015(E) Annex A (normative) Definition of skier type A.1 Skier types A.1.1 I t is the responsib ility of the skier to determine his skier-type classi fication as used in A.1.2 Skiers are classi fied by type of skiing into three categories, , , and The de finitions are as follows — Table A.1 Typ e : cautious skiing on s mo oth slop es of gentle to mo derate pitch T his typ e al so appl ies to entr y level skiers uncer tain of their clas s i fication S kiers who des ignate themselves as typ e receive lower than average release/retention settings This corresponds to an increased risk of inadvertent binding release, in order to gain increas ed cap acity for release in a fal l — — Typ e : skiers not clas s i fied in typ e or Typ e : fas t, aggres s ive skiing on slop es of mo derate to s teep pitch S kiers who des ignate themselves as typ e receive higher than average release/retention settings T his corres p onds to decreased cap acity for release in a fal l, in order to gain a decreased risk of inadver tent binding release T hese des ignations , , , and shou ld not b e used by equipment manufac turers to categori ze their products A.1.3 The information given in Table A.1 is an examp le of the kind of layout which may b e used to assist the skier in determining his skier-type classi fication Table A.1 — Determination of skier type classi fication Typ e Speed Slow to moderate Terrain Gentle to moderate Cautious (or Style A.1.4 smooth) Skiers that not meet all the de- Fas t Steep scriptions of either or Aggressive The information given in A.2 and A.2 can be used to assist the skier in determining the ap propriate skier-typ e classi fication and to make him aware of the risks related to each classi fication A.2 A.2 Discretionary settings Skiers years of age and older of any type who desire a higher or lower setting than the setting of their skier type according to 4.3 a) , 4.3 b) , 4.3 c) , or 4.3 d) may designate their p reference with a + or – next to their skier type designation A.2 The use of these de finitions in determining the release setting may b e inappropriate for some types of competition skiing © ISO 01 – All rights reserved I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n ISO 8061:2 015(E) ICS 97.220.20 Price based on pages © ISO 2015 – All rights reserved I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n