ASTM F2117-10

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Designation: F2117 − 10 An American National Standard
Standard Test Method for
Vertical Rebound Characteristics of Sports Surface/Ball
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Systems; Acoustical Measurement
This standard is issued under the fixed designation F2117; 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.
1. Scope 3.1.1 area elastic surface, n—surfaces where the energy at
impact is dispersed throughout an area significantly larger than
1.1 This test method covers the quantitative measurement
the impact point (for example, sprung wooden basketball
and normalization of the vertical rebound produced during
floors, poured urethane floors over sprung subfloor). Area
impacts between athletic balls and athletic surfaces.
elastic surfaces tend to produce a noticeable vibration when
1.2 Measurements may be conducted on nonathletic sur-
impacted.
faces to test the performance properties of the ball.
3.1.1.1 subfloor, n—any structural members found between
1.3 Measurementsmaybeconductedusingnonathleticballs
the playing surface and the underlying concrete base. Subfloor
to test the performance properties of the surface.
systems are typically found in sprung indoor playing surfaces
1.4 The methods described are applicable in both laboratory and can include but are not limited to: layers consisting of
and field settings.
sheets of plywood, layers consisting of strips of plywood, and
solid-wood members.
1.5 The values stated in metric units are to be regarded as
the standard.The inch-pound units given in parentheses are for
3.1.2 athletic surface, n—an athletic surface appropriate for
reference only.
the sport(s) of interest should be selected for testing. The
surface may be selected from previously installed surfaces and
1.6 This standard does not purport to address all of the
tested in its complete form, or smaller samples may be tested
safety concerns, if any, associated with its use. It is the
under laboratory settings.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
3.1.3 coeffıcient of restitution (CR), n—the ratio of rebound
bility of regulatory limitations prior to use.
height to release height. This parameter is useful for nonin-
flated balls that are found to be damaged by impacts with a
2. Referenced Documents
concrete reference surface. Construction differences and sen-
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sitivity to inflation pressure make this parameter inappropriate
2.1 DIN (Deutsches Institut fur Normung):
for comparing different playing surfaces based on results
18032 Part II, 1991 Section 5.8
obtained using inflated sporting balls.
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2.2 British Standards:
3.1.4 point elastic surface, n—surface where the energy at
7044, 1990, Section 2.1
impact is dispersed throughout an area that negligibly exceeds
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2.3 EN (European Committee for Standardization):
the impact point (for example, natural turf, artificial turf,
EN 12235 Surfaces for sports areas - Determination of
poured urethane surfaces). Point elastic surfaces do not pro-
vertical ball behaviour
duce noticeable vibrations when impacted.
3.1.5 reference surface, n—any section of a concrete slab
3. Terminology
with a smooth uniform, uncracked surface with a minimum
3.1 Definitions:
horizontal dimension of 30 cm (12 in.) that produces a rebound
with minimal horizontal movement.
1 3.1.6 resting time constant (K ), n—a time constant that
This test method is under the jurisdiction of ASTM Committee F08 on Sports
r
Equipment, Playing Surfaces, and Facilitiesand is the direct responsibility of
corrects for the duration that the ball is in contact with the
Subcommittee F08.52 on Miscellaneous Playing Surfaces.
surface.
Current edition approved June 1, 2010. Published August 2010. Originally
approved in 2001. Last previous edition approved in 2001 as F2117 – 01 which was
3.1.7 sporting ball, n—a sporting ball appropriate for the
withdrawn in February 2010 and reinstated in June 2010. DOI: 10.1520/F2117-10.
sport(s) of interest should be selected for testing. The test ball
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Available from DIN, Burggrafenstrasse 6, D-10787 Berlin, Germany.
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should be inspected to verify that it is spherical and devoid of
Available from BSI, 389 Chiswick High Road, London W4 4AL, UK.
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Available from ANSI, 1819 L Street, Washington, DC 20036, USA. bulges. Bulges indicate structural damage exists within the
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F2117 − 10
ball, that could affect the testing results. In the case of inflated 6.2 Sound Rec
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