ASTM F939-02

Standard Practice for Selection of Release Torque Values for Alpine Ski Bindings

SCOPE
1.1 This practice provides procedures for the selection of release torque values for Alpine ski/boot/bindings systems. These procedures may be used by ski binding manufacturers in their instructions for installation and use and by ski shops for the adjustment of already mounted ski bindings.
1.2 This practice is applicable to releasable Alpine ski/boot/binding systems.
1.3 Release torque values selected using this practice may not be appropriate for circumstances in which:
1.3.1 The skier carries an object that significantly increases the skier's effective body weight,
1.3.2 The skier grasps or in some manner controls an object such as a sled, or
1.3.3 The skier encounters exceptional snow or terrain conditions not commonly found on developed ski slopes.
1.4 This practice may be inappropriate for nonmechanical bindings or bindings used with boots that reach more than half way up the lower leg.
1.5 Release torque values outside the recommendations of this practice may increase the risk of injury to the skier. However, skiers who are informed of this potential risk may request such settings and have them provided, subject to any guidelines and limitations specified by the binding manufacturer.
1.6 These values refer to recommended release torque for initial adjustment of a ski binding and subsequent readjustment of the binding during routine maintenance or following a suspected malfunction. However, these values are not intended to apply to the condition of the equipment at any time after it is put into use.
1.6.1 For information concerning applicable tolerances to be used for the adjustment and inspection of releasable Alpine ski bindings in retail operations consult Practice F 1063; for rental applications consult Practice F 1064 .
1.7 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 appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 09-Sep-2002
• ICS: 97.220.20 - Winter sports equipment
• Technical Committee: F27 - Snow and Water Sports
• Drafting Committee: F27.10 - Binding Test Procedures

Relations

• Replaces: ASTM F939-99 - Standard Practice for Selection of Release Torque Values for Alpine Ski Bindings
• Effective Date: 10-Sep-2002
• Replaced By: ASTM F939-04 - Standard Practice for Selection of Release Torque Values for Alpine Ski Bindings
• Effective Date: 01-Sep-2004
• Referred By: ASTM F1061-08(2020) - Standard Specification for Ski Binding Test Devices
• Effective Date: 10-Sep-2002
• Referred By: ASTM F1064-21 - Standard Practice for Sampling and Inspection of Complete and Incomplete Alpine Ski/Binding/Boot Systems in Rental Applications
• Effective Date: 10-Sep-2002
• Referred By: ASTM F1063-22 - Standard Practice for Functional Inspections and Adjustments of Alpine Ski/Binding/Boot Systems
• Effective Date: 10-Sep-2002

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: F 939 – 02
Standard Practice for
1
Selection of Release Torque Values for Alpine Ski Bindings
This standard is issued under the fixed designation F 939; 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.
INTRODUCTION
Adhering to these guidelines may help to reduce the risk of injuries resulting from improper release
torque selection. However, skiing involves inherent risks. Injury can result from simply falling down,
impact with another object, or from many other actions. Many injuries are unrelated to binding
release/retention characteristics. Furthermore, even a properly adjusted binding cannot release under
all injury-producing loads or retain at all times when retention is desired. Therefore, it is to be clearly
understood that compliance with these guidelines in no way guarantees that injury can be prevented.
1. Scope suspected malfunction. However, these values are not intended
to apply to the condition of the equipment at any time after it
1.1 This practice provides procedures for the selection of
is put into use.
release torque values for Alpine ski/boot/bindings systems.
1.6.1 For information concerning applicable tolerances to
These procedures may be used by ski binding manufacturers in
be used for the adjustment and inspection of releasable Alpine
their instructions for installation and use and by ski shops for
ski bindings in retail operations consult Practice F 1063; for
the adjustment of already mounted ski bindings.
rental applications consult Practice F 1064 .
1.2 This practice is applicable to releasable Alpine ski/boot/
1.7 This standard does not purport to address all of the
binding systems.
safety concerns, if any, associated with its use. It is the
1.3 Release torque values selected using this practice may
responsibility of the user of this standard to establish appro-
not be appropriate for circumstances in which:
priate safety and health practices and determine the applica-
1.3.1 The skier carries an object that significantly increases
bility of regulatory limitations prior to use.
the skier’s effective body weight,
1.3.2 The skier grasps or in some manner controls an object
2. Referenced Documents
such as a sled, or
2.1 ASTM Standards:
1.3.3 The skier encounters exceptional snow or terrain
F 504 Test Method for Measuring the Quasi-Static Release
conditions not commonly found on developed ski slopes.
2
Moments of Alpine Ski Bindings
1.4 This practice may be inappropriate for nonmechanical
2
F 1061 Specification for Ski Binding Test Devices
bindings or bindings used with boots that reach more than half
F 1063 Practice for Functional Inspections and Adjustments
way up the lower leg.
2
of Alpine Ski/Boot/Binding Systems
1.5 Release torque values outside the recommendations of
F 1064 Practice for Sampling and Inspection of Complete
this practice may increase the risk of injury to the skier.
2
Alpine Ski/Boot/Binding Systems in Rental Applications
However, skiers who are informed of this potential risk may
2.2 ISO Standard:
request such settings and have them provided, subject to any
3
8061 Method for the Selection of Release Torque Values
guidelines and limitations specified by the binding manufac-
turer.
3. Terminology
1.6 These values refer to recommended release torque for
3.1 Definitions:
initial adjustment of a ski binding and subsequent readjustment
3.1.1 release/retention settings—the release torque of the
of the binding during routine maintenance or following a
ski/boot/binding system in twist (M ) and forward lean (M )as
z y
defined in Test Method F 504.
1
This practice is under the jurisdiction of ASTM Committee F27 on Snow
Skiing and is the direct responsibility of Subcommittee F27.10 on Binding Test
2
Procedures. Annual Book of ASTM Standards, Vol 15.07.
3
Current edition approved Sept. 10, 2002. Published November 2002. Originally Available from American National Standards Institute, 11 W. 42nd St., 13th
published as F 939 – 85. Last previous edition F 939 – 99. 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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F939–02
3.1.2 skier type—a classification selected by the skier for 5.1.1.2 If the mass of the skier is greater than or equal to 70
the type of skiing to be undertaken. kg:
3.1.2.1 I—a designation that provides lower than average
M 5 0.69 m 1 15 (2)
z s
release/retention settings; corresponds to an increased risk of
where m is the mass of the skier in kilograms.
s
inadvertent binding release in order to g
...