Designation:F717−10AnAmericanNationalStandardStandardSpecificationforFootballHelmets1ThisstandardisissuedunderthefixeddesignationF717;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONThisspecificationaddressesshockabsorptionrequirementsoffootballhelmets.Theaccelerationlimitsdescribedhereinwereguidedbythestate-of-the-arttechnologyconcerningmechanismsandtoleranceofheadinjuryandbytheperformanceofcurrentfootballhelmets,andshouldnotbeusedaslimitationsforhumantoleranceoraslimitsofacceptanceforothertestprocedures.Inadditiontotheminimumperformancetestsandinspectionproceduresdescribed,itistheintentofthisspecificationthatthesameaccelerationlimitsapplyforvelocitieslowerthanthatrequiredintheimpacttest,andatallhelmetlocationsabovethereferenceplane.Otherintentionsthatwerenotamenabletotestingorinspectionareofferedasguidelines:(1)thechinstrapandcupshouldbeattachedtothehelmetinamannertoenablethehelmettoremaininitsnormalpositiononthewearer’sheadduringplayandimpactconditions;(2)thephysicalcharacteristicsofmaterialsusedinconstructionofthehelmetshouldretaintheirshock-absorbingcharacteristicsundertheinfluenceofaging,use,orexposuretotypicalenvironmentalconditions.1.Scope1.1Thisspecificationcoversnewandreconditionedfootballhelmetsintendedforuseincompetitiveplayandpracticewithparticularreferencetoshockattenuationrequirements.1.2Thisspecificationestablishesshockabsorptionrequire-mentsofcompletehelmetswhentestedinaccordancewithTestMethodF429andestablishesrequirementsforconstruction,materials,visibility,andlabeling.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.2.ReferencedDocuments2.1ASTMStandards:2F429TestMethodforShock-AttenuationCharacteristicsofProtectiveHeadgearforFootball3.Terminology3.1DefinitionsofTermsSpeci...
