1、Designation:F71710An American National StandardStandard Specification forFootball Helmets1This standard is issued under the fixed designation F717;the number immediately following the designation indicates the year of originaladoption or,in the case of revision,the year of last revision.Anumber in p
2、arentheses indicates the year of last reapproval.Asuperscriptepsilon()indicates an editorial change since the last revision or reapproval.INTRODUCTIONThis specification addresses shock absorption requirements of football helmets.The accelerationlimits described herein were guided by the state-of-the
3、-art technology concerning mechanisms andtolerance of head injury and by the performance of current football helmets,and should not be usedas limitations for human tolerance or as limits of acceptance for other test procedures.In addition to the minimum performance tests and inspection procedures de
4、scribed,it is the intentof this specification that the same acceleration limits apply for velocities lower than that required inthe impact test,and at all helmet locations above the reference plane.Other intentions that were not amenable to testing or inspection are offered as guidelines:(1)thechin
5、strap and cup should be attached to the helmet in a manner to enable the helmet to remain in itsnormal position on the wearers head during play and impact conditions;(2)the physicalcharacteristics of materials used in construction of the helmet should retain their shock-absorbingcharacteristics unde
6、r the influence of aging,use,or exposure to typical environmental conditions.1.Scope1.1 This specification covers new and reconditioned footballhelmets intended for use in competitive play and practice withparticular reference to shock attenuation requirements.1.2 This specification establishes shoc
7、k absorption require-ments of complete helmets when tested in accordance with TestMethod F429 and establishes requirements for construction,materials,visibility,and labeling.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.2.R
8、eferenced Documents2.1 ASTM Standards:2F429 Test Method for Shock-Attenuation Characteristics ofProtective Headgear for Football3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 reference indexthe manufacturers recommended di-mension from the lowest point of the helmet face openi
9、ng tothe basic plane of a reference headform,both points located onthe median plane of the helmet.3.2 For descriptions of other terms used in this specification,refer to Test Method F429.4.Materials and Manufacture4.1 The materials used in those parts of the helmet whichcontact the head shall not be
10、 of a type known to cause irritationor disease.Paints,glues,and finishes used in manufacture shallbe compatible with materials used in the helmet shell andshock absorption system.4.2 The helmet,as tested,shall have no rigid externalprojections greater than 1.6 mm in height,except for face-guard;chin
11、 strap,nose bumper,or sweatband hardware.Anyfaceguards or faceguard hardware installed on the helmet mustbe removed prior to testing.4.2.1 All allowable external projections shall be smooth androunded so as to minimize the potential of injury.4.3 Any internal rigid projections that can contact thewe
12、arers head during impact shall be protected by some meansof cushioning or force spreading.4.4 The helmet shall provide peripheral vision clearance ofat least 105 to each side of the median plane when the helmetis adjusted to the reference headform with the reference index.1This specification is unde
13、r the jurisdiction of ASTM Committee F08 on SportsEquipment and Facilitiesand is the direct responsibility of Subcommittee F08.53 onHeadgear and Helmets.Current edition approved Aug.1,2010.Published September 2010.Originallyapproved in 1981.Last previous edition approved in 2006 as F717 89(2006).DOI
14、:10.1520/F0717-10.2For 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.Copyright ASTM International,100 Barr Harbor Dri
15、ve,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.Impact Requirements5.1 Each helmet model presented for impact testing shall befurnished with a reference index(see 3.1.1)as established bythe helmet manufacturer.This reference index shall be usedduring reference marking as described in
16、 the Test Proceduressection(portion on Reference Marking)of Test Method F429.5.2 Each helmet tested in compliance to Test Method F429shall meet the following requirements:5.2.1 In accordance with Test Method F429(Test Proce-dures section,portion on Multiple Impacts),the average gmaxof each set of three impacts delivered to six test locations perhelmet shall not exceed 275 g.For the additional three impactsdelivered to the two test locations with the highest mean gmax,no single impact shall have
