ASTM F429-01
(Test Method)Standard Test Method for Shock-Attenuation Characteristics of Protective Headgear for Football
Standard Test Method for Shock-Attenuation Characteristics of Protective Headgear for Football
SCOPE
1.1 This test method covers the determination of the shock-attenuation characteristics of protective headgear for football.
1.2 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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An American National Standard
Designation:F429–01
Standard Test Method for
Shock-Attenuation Characteristics of Protective Headgear
1
for Football
This standard is issued under the fixed designation F429; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This test method covers the determination of the shock-
2
attenuation characteristics of protective headgear for football.
1.2 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
responsibility 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 Documents
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2.1 ASTM Standards:
F717 Specification for Football Helmets
2.2 SAE Document:
J221 JUN 80 Instrumentation for Impact Tests, Require-
4
ments for Channel Class 1000
2.3 ISO Standard:
ISO/DIS 6220 Headforms For Use in the Testing of Protec-
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tive Helmets
3. Terminology
FIG. 1 ISO Headform—Basic, Reference, and Median Planes
3.1 Definitions of Terms Specific to This Standard:
3.1.1 basic plane—an anatomical plane that includes the
superior rims of the auditory meatuses (the upper edges of the
3.1.3 crown—a point in the median plane which is equal
external openings of the ears) and the notches of the inferior
chord lengths from the anterior and posterior intersections of
orbital ridges (the bottom of the eye sockets). See Fig. 1.
the median and reference planes.
3.1.2 coronal plane—a vertical plane that is perpendicular
3.1.4 drop height—the vertical distance between the lowest
to the median and reference planes and passes through the
point (impact point) of the elevated helmet and the apex of the
crown of the headform (lateral plane).
impact surface.
3.1.5 g—dimensionless ratio of the acceleration of the
headform during impact to the acceleration due to gravity.
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This test method is under the jurisdiction ofASTM Committee F08 on Sports
3.1.6 g —the maximum value of g encountered during
max
EquipmentandFacilitiesandisthedirectresponsibilityofSubcommitteeF08.53on
Headgear and Helmets. impact.
Current edition approved May 10, 2001. Published September 2001. Originally
3.1.7 median plane—averticalplanethatpassesthroughthe
published as F429–75. Last previous edition F429–00.
headform from front to back and divides it into right and left
2
Performance requirements for football helmets are found in Specification
halves (mid-sagittal plane).
F717.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 3.1.8 protective headgear—the assembled device and ac-
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
cessoriesassuppliedbythemanufacturerprimarilyintendedto
Standards volume information, refer to the standard’s Document Summary page on
protect the wearer’s head while participating in football.
the ASTM website.
4
3.1.9 reference plane—a plane that is located at a specified
Available from the Society ofAutomotive Engineers, 400 Commonwealth Dr.,
Warrendale, PA 15096.
distance above and parallel to the basic plane.
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Available from American National Standards Institute, 11 W. 42nd St., 13th
Floor, New York, NY 10036.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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F429–01
under at least 190-lbf (845-N) tension (see 12.4 for guide
assembly specifications and allowable weight of drop assem-
bly).
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6.2 Recording Equipment —The recording equipment shall
meet the following criteria:
6.2.1 Acceleration Transducer—The acceleration trans-
ducer is mounted at the center of gravity of the combined test
headformandcarriageassemblywiththesensitiveaxisaligned
to within 5° of the vertical when the helmet and headform are
in the impact position. The acceleration data channel complies
with SAE Recommended Practice J211 JUN 80 (a low pass
filter having a 4-pole Butterworth transfer function and a
corner frequency of 1650 Hz meets this requirement). Digital
filtering at 1650 Hz can be substituted.
6.2.2 System Accuracy—The impact recording system shall
be capable of measuring shocks of up to 500- g peak
acceleration with an accuracy of 65%.
6.2.3 Impact Recording—The impact shall be recorded on
single- or dual-trace storage oscilloscope with 0.1-mVto 20-V
deflectionfactor,1to5-mssweepspeed-division,and500-kHz
bandwidth.
6.2.4 Headforms—Standard headforms as described in 12.4
will be used for helmet impact testing.
6.2.5 Height Measuring Rod—A metal rod accurate to 6
0.10 in.
...
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