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ASTM F939-19

(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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

Status
Published
Publication Date
31-Dec-2018
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 F939-18 - Standard Practice for Selection of Release Torque Values for Alpine Ski Bindings
Effective Date
01-Jan-2019
Refers
ASTM F1063-09(2014) - Standard Practice for Functional Inspections and Adjustments of Alpine Ski/Binding/Boot Systems
Effective Date
01-Jul-2014
Referred By
ASTM F1063-22 - Standard Practice for Functional Inspections and Adjustments of Alpine Ski/Binding/Boot Systems
Effective Date
01-Jan-2019
Referred By
ASTM F1061-08(2020) - Standard Specification for Ski Binding Test Devices
Effective Date
01-Jan-2019
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-Jan-2019

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ASTM F939-19 - Standard Practice for Selection of Release Torque Values for Alpine Ski Bindings
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REDLINE ASTM F939-19 - Standard Practice for Selection of Release Torque Values for Alpine Ski BindingsREDLINE ASTM F939-19 - Standard Practice for Selection of Release Torque Values for Alpine Ski Bindings
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REDLINE ASTM F939-19 - Standard Practice for Selection of Release Torque Values for Alpine Ski Bindings
English language
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Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: F939 − 19
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, health, and environmental practices and deter-
the skier’s effective body weight,
mine the applicability of regulatory limitations prior to use.
1.3.2 Theskier graspsor insomemanner controlsanobject
1.8 This international standard was developed in accor-
such as a sled, or
dance with internationally recognized principles on standard-
1.3.3 The skier encounters exceptional snow or terrain
ization established in the Decision on Principles for the
conditions not commonly found on developed ski slopes.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
1.4 This practice may be inappropriate for non-mechanical
Barriers to Trade (TBT) Committee.
bindings or bindings used with boots that reach more than half
way up the lower leg.
2. Referenced Documents
1.5 Release torque values outside the recommendations of
2
2.1 ASTM Standards:
this practice may increase the risk of injury to the skier.
F504Test Method for Measuring the Quasi-Static Release
However, skiers who are informed of this potential risk may
Moments of Alpine Ski Bindings
request such settings and have them provided, subject to any
F1061Specification for Ski Binding Test Devices
guidelines and limitations specified by the binding manufac-
F1063Practice for Functional Inspections and Adjustments
turer.
of Alpine Ski/Binding/Boot Systems
1.6 These values refer to recommended release torque for
F1064Practice for Sampling and Inspection of Complete
initialadjustmentofaskibindingandsubsequentreadjustment
and Incomplete Alpine Ski/Binding/Boot Systems in
Rental Applications
1
This practice is under the jurisdiction ofASTM Committee F27 on Snow and
Water Sports and is the direct responsibility of Subcommittee F27.10 on Binding
2
Test Procedures. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Jan. 1, 2019. Published February 2019. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1985. Last previous edition approved in 2018 as F939–18. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/F0939-19. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
F939 − 19
3
2.2 ISO Standard: 5. Procedures
8061Method for the Selection of Release Torque Values
5.1 Arange of twist release t
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM 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 − 18 F939 − 19
Standard Practice for
1
Selection of Release Torque Values for Alpine Ski Bindings
This standard is issued under the fixed designation F939; 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.
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
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, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.8 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
1
This practice is under the jurisdiction of ASTM Committee F27 on Snow and Water Sports and is the direct responsibility of Subcommittee F27.10 on Binding Test
Procedures.
Current edition approved Jan. 1, 2018Jan. 1, 2019. Published March 2018February 2019. Originally approved in 1985. Last previous edition approved in 20122018 as
F939 – 12.F939 – 18. DOI: 10.1520/F0939-18.10.1520/F0939-19.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
F939 − 19
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
3
2.2 ISO Standard:
8061 Method for the Selection of Release Torque Values
3. Terminolog
...

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