ASTM F911-85(1994)
(Test Method)Standard Test Method for Flexibility of Running Shoes (Withdrawn 2002)
Standard Test Method for Flexibility of Running Shoes (Withdrawn 2002)
SCOPE
1.1 This test method covers the measurement of flexibility in running shoes.
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 whoever uses this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
General Information
Standards Content (Sample)
Designation: F 911 – 85 (Reapproved 1994)
Standard Test Method for
1
Flexibility of Running Shoes
This standard is issued under the fixed designation F 911; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.5 heel hold-down clamp—a 3 cm (1.18 in.) diameter, 1
cm (0.39 in.) minimum thickness, metal piece upon which a
1.1 This test method covers the measurement of flexibility
force of 22.2 N (5 lbf) is directly downward to the insole of the
in running shoes.
heel in order to keep the shoe in contact with the heel plate
1.2 This standard does not purport to address all of the
covers. Its periphery in contact with the insole is radiused to 1
safety concerns, if any, associated with its use. It is the
cm (0.39 in.) to reduce dragging forces. The axis of symmetry
responsibility of whoever uses this standard to consult and
is perpendicular to and directed thru the intersection of the
establish appropriate safety and health practices and deter-
fixture and heel plate centerlines. This clamp will be adjustable
mine the applicability of regulatory limitations prior to use.
3
in height above the heel reference line from about 1 to 5 cm ( ⁄8
2. Referenced Documents to 2 in.).
3.1.6 heel hold-down reference—the point on the axis of
2.1 ASTM Standards:
2
symmetry of the heel hold-down clamp at the interface with the
F 489 Test Method for Using a James Machine
2
heel insole material.
F 539 Practice for Fitting Athletic Footwear
3.1.7 heel plate—an approximately 7.5 by 15 cm (3 by 6 in.)
F 609 Test Method for Using a Horizontal Pull Slipmeter
1
2
metal plate at least 6 mm ( ⁄4 in.) thick whose centerline (as
(HPS)
shown in Figs. 1 and 2) is the pivot point upon which the
3. Terminology
flexing force is applied. The pivot point is 10.16 cm (4 in.)
(from the flex fulcrum center to center).
3.1 Definitions of Terms Specific to This Standard:
3.1.8 heel plate cover—an approximately 7.5 by 13 cm (3
3.1.1 ball base-plate—an approximately 5 by 15 cm (2 by 6
1
by 5 in.) fluorocarbon sheet 3 mm ( ⁄8 in.) thick affixed to the
in.) metal plate with its largest dimension parallel to the flex
top of the heel plate to minimize friction. The fore and aft 1.27
fulcrum and centered opposite the ball hold-down clamp. A
1
cm ( ⁄2 in.) of the sheet is beveled down to the heel plate to
force of 334 N (75 lbf) applied to the shoe in the direction of
prevent the catching of any sole cleats.
the ball hold-down clamp provides a firm but relatively
3.1.9 heel reference line—the centerline of the heel plate
nondamaging clamping pressure to the shoe.
directly above its pivot points at the interface of the heel plate
3.1.2 ball hold-down clamp—a trapezoidal shaped metal
cover and the shoe sole. When this line is plantar level with the
piece which is intended to approximate the ball of the foot.
force actuated ball base plate, the minimum flex angle is
(See Figs. 1 and 2 for exact dimensions.) Its base in contact
established by the hold-down clamp reference.
with the shoe is 3.8 cm (1.5 in.) long and is congruous with the
3.1.10 maximum flex angle—a 45° angle defined by the
axis of the flex fulcrum as shown in the attached drawings. Its
intersection of the plane of the bottom of the ball hold-down
periphery in contact with the shoe has a radius of 1 cm (0.4 in.).
clamp and the plane formed by the flex fulcrum line/heel
3.1.3 flex fulcrum—the line on the insole, perpendicular to
hold-down reference. This is the condition of the maximum
the shoe centerline and at a distance of 70% of the shoe length
flexion during the cyclic testing and also where the flex torque
from the rearmost part of the heel counter about which the
is measured.
flexing torque is applied.
3.1.11 minimum flex angle—the angle defined by the inter-
3.1.4 heel hold-down bridge—a metal yoke firmly attached
section of the plane of the bottom of the ball hold-down clamp
the heel plate which can support the heel hold-down clamp. It
and the plane formed by the flex fulcrum line/heel hold-down
must have a minimum clearance of 10 cm (4 in.) above the heel
reference when the shoe is properly installed and both forces
reference line and 13 cm (5 in.) of lateral clearance to avoid
applied.
touching the shoe upper material.
3.1.12 peak flex torque—the torque about the flex fulcrum at
the maximum flex angle.
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This test method is under the jurisdiction of ASTM Committee F-8 on Sports
3.1.13 shoe centerline—line through points used to measure
Equipment, Surfaces, and Facilities and is the direct responsibility of Subcommittee
shoe length.
F08.54 on Footwear.
3.1.14 shoe length—distance from foremost portion of toe
Current edition approved Feb. 22, 1985. Published May 1985.
2
Annual Book of ASTM Standards, Vol 15.07. (excluding cleats) to rearmost portion of heel
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