ASTM_F_504_-_05_2012.pdf

Designation:F50405(Reapproved 2012)Standard Test Method forMeasuring the Quasi-Static Release Moments of Alpine SkiBindings1This standard is issued under the fixed designation F504;the number immediately following the designation indicates the year of originaladoption or,in the case of revision,the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers a procedure for the measure-ment of release moments of ski bindings under conditionswhere inertia loadings of the ski binding system are notsignificant.1.2 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2F498 Test Method for Center Spring Constant and SpringConstant Balance of Alpine SkisF779 Test Method for Torsion Characteristic of Alpine SkisF944 Specification for Properties of Adult Alpine Ski Boots(Withdrawn 2004)32.2 ISO Standard:4ISO 9838 Alpine Ski BindingsTest Soles for Ski BindingTestsISO 9462 Alpine Ski BindingsSafety Requirements andTest MethodsISO 9465 Alpine Ski BindingsLateral Release under Im-pact Loading-Test Method3.Terminology3.1 The following terminology is introduced with referenceto the sketch of the boot-ski system shown in Fig.1.3.1.1 Six points of load application to the standard test skiare required.With the adult boot sole(300 mm in length)themost forward point,located at a position 90 6 0.5 cm from thecenterline of the test shaft,shall be called the“forward point”and shall be designated as F.The second point,45 6 0.5 cm infront of the centerline of the test shaft,shall be designated the“near point,”N.The third point,located 45 6 0.5 cm behindthe centerline of the test shaft,shall be designated“rear point,”R.The fourth point,located 35 6 0.5 cm in front of the centerline of the test shaft,shall be designated the“near preloadpoint,”NP.The fifth point,located 75 6 0.5 cm behind thecenterline of the test shaft shall be designated the“far rearpoint,”FRP.The sixth point,the“alternate near preload point,”ANP,is located 7.5 6 0.25 cm,in the minus y-direction fromthe point NP.For sole lengths longer than 300 mm the F andFR points are not changed from the location used for the 300mm boot sole.For sole lengths shorter than 300 mm the N,R,ANP and NP points are not changed from the location used forthe 300 mm sole.For bindings which are to be used exclusivelywith skis shorter than the test ski,F and FR tests shall beperformed at the N and R points.If the ski is too short for thespecified N and R points,N and R shall be moved closer to thez-axis by 10 cm each,and all tests performed using the new Nand R points.The forces that are applied to the standard ski atthese six designated points may now be described by simplevector notation.A laboratory-fixed axis designation shall beused with the numeral z denoting the vertical axis normal to thetop face of the ski(in the region of the test shaft)and positivein the direction outward from the ski;the numeral x denotingthe longitudinal axis,positive in the forward direction of theski;and the numeral y denoting the lateral axis,the positivedirection of which is determined by the right-hand rule.Thez-axis is coincident with the centerline of the test shaft.Theorigin of the XYZ coordinate system is a point 230 mm alongthe axis of the test shaft from the bearing surface of the test solefor 300 mm test soles.The location is changed proportionallyfor soles other than 300 mm.The direction of any force applied1This test method is under the jurisdiction of ASTM Committee F27 on SnowSkiing and is the direct responsibility of Subcommittee F27.10 on Binding TestProcedures.Current edition approved June 1,2012.Published July 2012.Originally approvedin 1977.Last previous edition approved in 2005 as F504 05.DOI:10.1520/F0504-05R12.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 to the ski is defined by its unit vector.The magnitude of apreload force applied to the ski is defined by the Mzor Mymoment created by the force.4.Summary of Test Method4.1 The ski binding is mounted on a standard ski and astandard boot sole is inserted into the binding.A relatively stifftest shaft instrumented for moments is affixed to the sole andattached r