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ASTM F939-12

(Practice)

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

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

ABSTRACT
This practice establishes procedures for the selection of release torque values for Alpine ski/boot/binding systems. The recommended release torque is chosen based on skier type, age, and other factors such as adjustments for normal, discretionary, and release/retention settings. Also discussed are methods of selecting skier type, determining skier code, and determining release torque value. Procedures discussed in this practice may be used by ski binding manufacturers in their instructions for installation and use and by ski shops for making adjustments on already mounted ski bindings. However, this practice does not cover nonmechanical bindings or bindings used with boots that reach more than halfway up the lower leg.
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 non-mechanical 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 F1063; for rental applications consult Practice F1064.
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
31-May-2012
ICS
97.220.20 - Winter sports equipment
Technical Committee
F27 - Snow and Water Sports
Drafting Committee
F27.10 - Binding Test Procedures
Current Stage
Ref Project

Relations

Replaces
ASTM F939-06 - Standard Practice for Selection of Release Torque Values for Alpine Ski Bindings
Effective Date
01-Jun-2012
Replaced By
ASTM F939-18 - Standard Practice for Selection of Release Torque Values for Alpine Ski Bindings
Effective Date
01-Jan-2018
Referred By
ASTM F1061-08(2020) - Standard Specification for Ski Binding Test Devices
Effective Date
01-Jun-2012
Referred By
ASTM F1063-22 - Standard Practice for Functional Inspections and Adjustments of Alpine Ski/Binding/Boot Systems
Effective Date
01-Jun-2012
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
01-Jun-2012

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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: F939 − 12
Standard Practice for
1
Selection of Release Torque Values for Alpine Ski Bindings
ThisstandardisissuedunderthefixeddesignationF939;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
Adheringtotheseguidelinesmayhelptoreducetheriskofinjuriesresultingfromimproperrelease
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 of the binding during routine maintenance or following a
suspectedmalfunction.However,thesevaluesarenotintended
1.1 This practice provides procedures for the selection of
to apply to the condition of the equipment at any time after it
release torque values for Alpine ski/boot/bindings systems.
is put into use.
Theseproceduresmaybeusedbyskibindingmanufacturersin
1.6.1 For information concerning applicable tolerances to
their instructions for installation and use and by ski shops for
be used for the adjustment and inspection of releasableAlpine
the adjustment of already mounted ski bindings.
ski bindings in retail operations consult Practice F1063; for
1.2 ThispracticeisapplicabletoreleasableAlpineski/boot/
rental applications consult Practice F1064.
binding systems.
1.7 This standard does not purport to address all of the
1.3 Release torque values selected using this practice may
safety concerns, if any, associated with its use. It is the
not be appropriate for circumstances in which:
responsibility of the user of this standard to establish appro-
1.3.1 The skier carries an object that significantly increases
priate safety and health practices and determine the applica-
the skier’s effective body weight,
bility of regulatory limitations prior to use.
1.3.2 Theskier graspsor insomemanner controlsanobject
2. Referenced Documents
such as a sled, or
2
1.3.3 The skier encounters exceptional snow or terrain
2.1 ASTM Standards:
conditions not commonly found on developed ski slopes.
F504Test Method for Measuring the Quasi-Static Release
Moments of Alpine Ski Bindings
1.4 This practice may be inappropriate for non-mechanical
F1061Specification for Ski Binding Test Devices
bindings or bindings used with boots that reach more than half
F1063Practice for Functional Inspections and Adjustments
way up the lower leg.
of Alpine Ski/Binding/Boot Systems
1.5 Release torque values outside the recommendations of
F1064Practice for Sampling and Inspection of Complete
this practice may increase the risk of injury to the skier.
and Incomplete Alpine Ski/Binding/Boot Systems in
However, skiers who are informed of this potential risk may
Rental Applications
request such settings and have them provided, subject to any
3
2.2 ISO Standard:
guidelines and limitations specified by the binding manufac-
8061Method for the Selection of Release Torque Values
turer.
3. Terminology
1.6 These values refer to recommended release torque for
initialadjustmentofaskibindingandsubsequentreadjustment
3.1 Definitions:
1 2
This practice is under the jurisdiction of ASTM Committee F27 on Snow For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Skiing and is the direct responsibility of Subcommittee F27.10 on Binding Test contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Procedures. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved June 1, 2012. Published June 2012. Originally the ASTM website.
3
approved in 1985. Last previous edition approved in 2006 as F939–06. DOI: Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
10.1520/F0939-12. 4th Floor, New York, NY 10036.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
F939 − 12
3.1.1 release/retention settings—release torque of the ski/ M 50.84 m 14 (1)
z s
boot/binding system in twist (M ) and forward lean (M)as
z y
5.1.1.2 If the mass of the skier is greater than or equal to 70
defined in Test Method F504.
kg:
3.1.2 skier type—classification selected by the skier for the
M 50.69 m 115 (2)
z s
type of skiing to be undertaken.
where:
3.1.2.1 I—designation that provides lower than average
m
...

This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:F939–06 Designation:F939–12
Standard Practice for
1
Selection of Release Torque Values for Alpine Ski Bindings
ThisstandardisissuedunderthefixeddesignationF939;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
Adheringtotheseguidelinesmayhelptoreducetheriskofinjuriesresultingfromimproperrelease
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
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 non-mechanical 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 F1063; for rental applications consult Practice F1064.
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.
2. Referenced Documents
2
2.1 ASTM Standards:
F504 Test Method for Measuring the Quasi-Static Release Moments of Alpine Ski Bindings
F1061 Specification for Ski Binding Test Devices
F1063 Practice for Functional Inspections and Adjustments of Alpine Ski/Binding/Boot Systems
F1064 Practice for Sampling and Inspection of Complete and Incomplete Alpine Ski/Binding/Boot Systems in Rental
Applications
1
This practice is under the jurisdiction ofASTM Committee F27 on Snow Skiing and is the direct responsibility of Subcommittee F27.10 on Binding Test Procedures.
Current edition approved Aug.June 1, 2006.2012. Published August 2006.June 2012. Originally approved in 1985. Last previous edition approved in 20052006 as
F939–05a.F939–06. DOI: 10.1520/F0939-06.10.1520/F0939-12.
2
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
F939–12
3
2.2 ISO Standard:
8061 Method for the Selection of Release Torque Values
3. Terminology
3.1 Definitions:
3.1.1 release/retention settings—release torque of the ski/boot/binding system in twist (M ) and forward lean (M ) as defined
z y
in Test Method F504.
3.1.2 skier ty
...

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