ASTM F2508-15
(Practice)Standard Practice for Validation, Calibration, and Certification of Walkway Tribometers Using Reference Surfaces
Standard Practice for Validation, Calibration, and Certification of Walkway Tribometers Using Reference Surfaces
SIGNIFICANCE AND USE
5.1 To be meaningful, walkway tribometer results must correlate the slip characteristics of a surface or contaminant, or both, to the actual propensity for human slips. To achieve this goal, walkway tribometer models must be validated against a standard with relevance to human ambulation.
5.2 This practice prescribes a series of reference surfaces with known relative slip potential ranging from very high to low (as defined by laboratory conditions only) upon which walkway tribometer models can be validated. The relative slip potential of each reference surface was established from human subject walking trials.3
5.3 The following should be considered in applying the validation and calibration obtained by this practice:
5.3.1 The scientific study upon which the validation process is based was conducted with a select population of young adults (mean age 26 years) who were free from gait deviations while walking in a straight path on a level surface with a mean walking velocity of 2.18 m/s. This walking velocity is faster than the average walking velocity for the general population which includes a much wider age range with greater variability; thus, the study sample population of pedestrians and conditions is not representative of the larger general population of pedestrians.
5.3.2 All subjects walked in Oxford-style shoes whose soles were constructed of smooth styrene butadiene rubber (SBR) with 75A Shore hardness. The shoe style and sole material is not representative of all combinations available in the marketplace.
5.3.3 The reference surfaces defined in this practice are not representative of all walkway surfaces. The outcome of the validation practice reflects performance on the type of reference surfaces and surface conditions defined in this practice only. Validation and calibration of a walkway tribometer as defined by this practice does not imply validation and calibration under all combinations of test foot materials and walkway surfaces.
5...
SCOPE
1.1 This practice is intended to establish the procedures for validation, calibration, and certification of walkway tribometers.
1.2 This practice provides a walkway tribometer supplier with a procedure and suite of reference surfaces to validate his walkway tribometer by properly ranking and differentiating the surfaces.
1.3 This practice provides the user of a walkway tribometer with a procedure and suite of reference surfaces to test calibration of his instrument.
1.4 This practice provides a procedure through which an entity may certify a walkway tribometer model, signifying that the walkway tribometer model has a completed and documented validation and interlaboratory study.
1.5 This practice describes the necessary materials, specifications, and the cleaning process for reference materials, as well as the requirements for the validation of a supplier’s walkway tribometer and calibration of a user’s walkway tribometer.
1.6 This practice applies to walkway tribometers without reference to the nature of the scale of the readings produced by them. The scale used in the reports of validation and calibration must be the same, and are to be those of the instrument or defined for the instrument.
1.7 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only and are not considered standard.
1.8 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.
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Designation:F2508 −15 AnAmerican National Standard
Standard Practice for
Validation, Calibration, and Certification of Walkway
1
Tribometers Using Reference Surfaces
This standard is issued under the fixed designation F2508; 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 2. Referenced Documents
2
1.1 This practice is intended to establish the procedures for 2.1 ASTM Standards:
validation, calibration, and certification of walkway tribom- D1349 Practice for Rubber—Standard Conditions for Test-
eters. ing
D3244 Practice for Utilization of Test Data to Determine
1.2 This practice provides a walkway tribometer supplier
Conformance with Specifications
with a procedure and suite of reference surfaces to validate his
E691 Practice for Conducting an Interlaboratory Study to
walkwaytribometerbyproperlyrankinganddifferentiatingthe
Determine the Precision of a Test Method
surfaces.
F1646 Terminology Relating to Walkway Safety and Foot-
1.3 This practice provides the user of a walkway tribometer
wear
with a procedure and suite of reference surfaces to test
calibration of his instrument.
3. Terminology
1.4 This practice provides a procedure through which an
3.1 Fortermsusedinthispracticenotidentifiedherein,refer
entity may certify a walkway tribometer model, signifying that
to Terminology F1646.
the walkway tribometer model has a completed and docu-
3.2 Definitions:
mented validation and interlaboratory study.
3.2.1 paired t-test, n—a test of statistical significance based
1.5 This practice describes the necessary materials,
on the use of student’s t-distribution and used to compare two
specifications,andthecleaningprocessforreferencematerials,
sample means (see Appendix X2).
as well as the requirements for the validation of a supplier’s
3.2.2 supplier, n—any individual, agent, company,
walkway tribometer and calibration of a user’s walkway
manufacturer, or organization responsible for the walkway
tribometer.
tribometer prior to receipt by the user. D3244
1.6 This practice applies to walkway tribometers without
3.2.3 test foot, n—shoe bottom material or surrogate
reference to the nature of the scale of the readings produced by
mounted on the walkway tribometer that comes into contact
them.Thescaleusedinthereportsofvalidationandcalibration
with the surface being tested.
must be the same, and are to be those of the instrument or
3.2.4 walkway tribometer, n—any apparatus used to mea-
defined for the instrument.
sure the frictional forces acting at an interface between a
1.7 The values stated in SI units are to be regarded as
walkway surface and shoe material.
standard. The values given in parentheses are for information
3.2.4.1 Discussion—A judgement of the adequacy of these
only and are not considered standard.
frictional forces acting on a walkway surface/shoe surface
interface is the basis for an assessment of slip properties
1.8 This standard does not purport to address all of the
relative to human locomotion.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
3.3 Definitions of Terms Specific to This Standard:
priate safety and health practices and determine the applica-
3.3.1 calibration, n—the set of operations that establishes,
bility of regulatory limitations prior to use.
under specified conditions, the relationship between the values
obtained by a walkway tribometer and the corresponding
supplier reference values.
1
This practice is under the jurisdiction ofASTM Committee F13 on Pedestrian/
Walkway Safety and Footwear and is the direct responsibility of Subcommittee
2
F13.10 on Traction. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
CurrenteditionapprovedMay1,2015.PublishedJuly2016.Originallyapproved contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
in 2011. Last previous edition approved in 2013 as F2508 – 13. DOI: 10.1520/ Standards volume information, refer to the standard’s Document Summary page on
F2508-15. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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F2508−15
3.3.2 certification test method, n—aspecifictestmethodthat both, to the actual propensity for human slips. To achieve this
is used for all walkway tribometer operational tasks in this goal, walkway tribometer models must be validated against a
practice performed as part of a certification. standard with relevance to human ambulation.
3.3.3 laboratory, n—a combination of one indi
...
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: F2508 − 13 F2508 − 15 An American National Standard
Standard Practice for
Validation, Calibration, and Certification of Walkway
1
Tribometers Using Reference Surfaces
This standard is issued under the fixed designation F2508; 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
1.1 This practice is intended to establish the procedures for validation, calibration, and certification of walkway tribometers.
1.2 This practice provides a walkway tribometer supplier with a procedure and suite of reference surfaces to validate his
walkway tribometer by properly ranking and differentiating the surfaces.
1.3 This practice provides the user of a walkway tribometer with a procedure and suite of reference surfaces to test calibration
of his instrument.
1.4 This practice provides a procedure through which an entity may certify a walkway tribometer model, signifying that the
walkway tribometer model has a completed and documented validation and interlaboratory study.
1.5 This practice describes the necessary materials, specifications, and the cleaning process for reference materials, as well as
the requirements for the validation of a supplier’s walkway tribometer and calibration of a user’s walkway tribometer.
1.6 This practice applies to walkway tribometers without reference to the nature of the scale of the readings produced by them.
The scale used in the reports of validation and calibration must be the same, and are to be those of the instrument or defined for
the instrument.
1.7 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only and
are not considered standard.
1.8 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:
D1349 Practice for Rubber—Standard Conditions for Testing
D3244 Practice for Utilization of Test Data to Determine Conformance with Specifications
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
F1646 Terminology Relating to Walkway Safety and Footwear
3. Terminology
3.1 For terms used in this practice not identified herein, refer to Terminology F1646.
3.2 Definitions:
3.2.1 paired t-test, n—a test of statistical significance based on the use of student’s t-distribution and used to compare two
sample means (see Appendix X2).
3.2.2 supplier, n—any individual, agent, company, manufacturer, or organization responsible for the walkway tribometer prior
to receipt by the user. D3244
1
This practice is under the jurisdiction of ASTM Committee F13 on Pedestrian/Walkway Safety and Footwear and is the direct responsibility of Subcommittee F13.10
on Traction.
Current edition approved April 1, 2013May 1, 2015. Published April 2013July 2016. Originally approved in 2011. Last previous edition approved in 20122013 as F2508
– 12a.13. DOI: 10.1520/F2508-13.10.1520/F2508-15.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@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 ----------------------
F2508 − 15
3.2.3 test foot, n—shoe bottom material or surrogate mounted on the walkway tribometer that comes into contact with the
surface being tested.
3.2.4 walkway tribometer, n—any apparatus used to measure the frictional forces acting at an interface between a walkway
surface and shoe material.
3.2.4.1 Discussion—
A judgement of the adequacy of these frictional forces acting on a walkway surface/shoe surface interface is the basis for an
assessment of slip properties relative to human locomotion.
3.3 Definitions of Terms Specific to This Standard:
3.3.1 calibration, n—the set of operations that establishes, under specified conditions, the relationship between the values
obtained by a walkway tribometer and the corresponding supplier reference values.
3.3.2
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