ASTM F1936-98

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An American National Standard
Designation: F 1936 – 98
Standard Specification for
Shock-Absorbing Properties of North American Football
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Field Playing Systems as Measured in the Field
This standard is issued under the fixed designation F 1936; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
NOTE 1—Additional references are listed at the end of this specifica-
1. Scope
tion.
1.1 This specification covers a test method and maximum
impact attenuation for all types of installed turf playing
3. Terminology
systems for North American football.
3.1 Definitions of Terms Specific to This Standard:
1.2 It is recognized that laboratory testing results often
3.1.1 abnormal drop—any drop of the missile which, due to
reflect optimum conditions which may not correspond to the
operator or equipment problem(s) or uncertainty, results in a
actual site conditions. Therefore, a method of testing along
reading which is questionable.
with a maximum for impact attenuation of installed synthetic
3.1.2 average G —sum of the G of the second and
max max
turf playing systems is addressed herein.
third drops divided by two and rounded to the nearest whole
1.3 This specification does not imply that an injury cannot
number.
be incurred if the surface system complies with this specifica-
3.1.3 combination field system—a field system which com-
tion.
bines a natural turf surface which is enhanced by use of
1.4 The following precautionary statement pertains only to
synthetic elements such as synthetic turf substructures, exclud-
the test procedure portion, Section 9, of this specification: This
ing water/drainage systems and single layer mesh fabrics,
standard does not purport to address all of the safety concerns,
which are used for the sole source purpose of soil stabilization.
if any, associated with its use. It is the responsibility of the user
3.1.4 drop height—height from which the missile is re-
of this standard to establish appropriate safety and health
leased as measured from the bottom of the missile face to the
practices and determine the applicability of regulatory limita-
top of the surface system.
tions prior to use.
3.1.5 drop test—a set of three successive and recorded
drops of the impact missile onto the synthetic turf system
2. Referenced Documents
within the guidelines prescribed.
2
2.1 ASTM Standards:
3.1.6 G—the ratio of magnitude of missile acceleration
F355 Test Method for Shock-Absorbing Properties of Play-
during impact to the acceleration of gravity, expressed in the
ing Surface Systems and Materials
same units (g, that has units, can be measured, but G, being a
F1292 Specification for Impact Attenuation of Surfacing
ratio, is unitless).
Materials Within the Use Zone of Playground Equipment
3.1.7 G —the maximum value of G encountered during
max
F1551 TestMethodsforComprehensiveCharacterizationof
an impact rounded to the nearest whole number.
Synthetic Turf Playing Surfaces and Materials
3.1.8 impact velocity—the velocity of the missile as it
2.2 ISO Standard:
impacts the surface system.
3
ISO 6587
3.1.9 missile—the striking part of the testing apparatus.
3.1.10 natural grass field system—a field system which is
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This specification is under the jurisdiction ofASTM Committee F08 on Sports comprised of live and growing grass or other plant like
Equipment and Facilities andisthedirectresponsibilityofSubcommittee F08.65 on
materials which are rooted in soil.
Artificial Turf Surfaces and Systems.
3.1.11 pile—a surface texture composed of many individual
Current edition approved Nov. 10, 1998. Published March 1999.
2
thin strands or groups of strands bound to a backing fabric in
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
a repetitive array.
Standards volume information, refer to the standard’s Document Summary page on
3.1.12 pile layover—horizontal motion of the pile under the
the ASTM website.
3 influence of impact.
Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
4th Floor, New York, NY 10036, http://www.ansi.org.
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F1936–98
3.1.13 restraining ring—a rigid circular device with a striking the surface, ensuring a vertical impact and precluding
smooth or polished surface, creating little or no friction, used the missiles rebound onto the top of the ring.
to restrict the horizontal movement of the missile upon impact. 7.3 The t
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