1、Designation:F256911An American National StandardStandard Test Method forEvaluating the Force Reduction Properties of Surfaces forAthletic Use1This standard is issued under the fixed designation F2569;the number immediately following the designation indicates the year oforiginal adoption or,in the ca
2、se of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers the quantitative measurementand normalization of impact forces generated
3、 through a me-chanical impact test on an athletic surface.The impact forcessimulated in this test method are intended to represent thoseproduced by lower extremities of an athlete during landingevents on sport or athletic surfaces.1.2 This test method may be applied to any surface whereathletic acti
4、vity may be conducted.1.3 The test methods described are applicable in bothlaboratory and field settings.1.4 The values stated in SI units are to be regarded asstandard.The values given in parentheses are for informationonly.1.5 This standard does not purport to address all of thesafety concerns,if
5、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:2E177 Practice for Use of the Terms Precision and Bi
6、as inASTM Test MethodsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method2.2 DIN Standard:3DIN 18032-2 Halls for Gymnastics,Games and Multipur-pose Use,Part 2:Sports Floors,Requirements,Testing3.Terminology3.1 Definitions of Terms Specific to This Standar
7、d:3.1.1 force reduction,nability of a surface to reduceimpact forces as compared to a rigid surface using a specifiedimpact.Force reduction expresses the difference between theimpact forces generated on the test and rigid surfaces as thepercentage of the impact force from the rigid surface.3.1.2 rig
8、id surface,nconcrete surface covered by a steelplate used as the basis for measuring force reduction.3.1.3 test surface,nathletic surface upon which forcereduction testing is conducted(for example,indoor woodcourts,poured urethane courts,walk/jog tracks,and so forth).4.Summary of Test Method4.1 The
9、dynamic interaction between the athlete and thesurface is significant to the performance,comfort,and possiblythe safety of the athlete.Therefore,the ability of the surface toreduce impact forces is important.This test method provides anon-destructive means for evaluating the force reduction prop-ert
10、ies of a surface in both laboratory and field settings.Impactforces are recorded by releasing a 20 kg mass and allowing itto impact a spring resting on a test foot resting on the surface.The force reduction of the surface is presented as a percentageof the reduction in the impact forces produced on
11、the testsurface,compared to the impact force generated on a rigidsurface.This test method is more closely associated with theimpacts generated by the lower extremities,and is not anindication of the ability of the test surface to prevent headinjury trauma.5.Significance and Use5.1 The force reductio
12、n property is just one of the importantproperties of a surface used for athletic activity.It may be anindicator of the performance,safety,comfort,or suitability ofthe surface.5.2 Manufacturers of athletic surfaces may use this testmethod to evaluate the effects of design changes on the impactforces
13、generated on the surface.5.3 Facility owners may use this standard to evaluate theperformance of existing sport/athletic surfaces.Results may be1This test method is under the jurisdiction of ASTM Committee F08 on SportsEquipment,Playing Surfaces,and Facilities and is the direct responsibility ofSubc
14、ommittee F08.52 on Miscellaneous Playing Surfaces.Current edition approved Nov.1,2011.Published February 2012.Originallyapproved in 2007.Last previous edition approved in 2007 as F2569 07.DOI:10.1520/F2569-11.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer
15、Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from Beuth Verlag GmbH(DIN-DIN Deutsches Institut furNormung e.V.),Burggrafenstrasse 6,10787,Berlin,Germany,http:/www.en.din.de.Copyright ASTM Int
16、ernational,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 useful during the selection process for a replacement surface,or for an additional athletic surface being added to the facility.5.4 Facility owners may also use this test method to verifythat newly installed surfaces perform at or near the levelsincluded in project specifications.6.Apparatus6.1 Force Reduction Test ApparatusThis test methodutilizes a force reduction test device similar to the one outlined
