ASTM F3539-24

Standard Practice for Creation of Walkway Tribometer Interlaboratory Study Reports and Test Procedures

SIGNIFICANCE AND USE
5.1 The test procedures and interlaboratory study report that result from coordinator compliance with this Practice are intended to include all information required for an ASTM Test Method and its associated Research Report; the interlaboratory study is to be conducted in compliance with Practice E691, also as required for an ASTM Test Method.3 The reason that the content of this Practice is not prepared as an actual ASTM Test Method is as follows. ASTM regulations preclude reference (in a Standard) to patented or otherwise proprietary test apparatus where “alternatives exist”.4 While a proprietary apparatus may be mentioned in the Test Method’s Research Report, this would prevent the Test Method from being a standalone document containing all information necessary for testing. As such, a standalone Test Method could only be for a non-proprietary apparatus design, with this design expressed in terms of physical characteristics and performance specifications sufficient to enable the reader to fabricate their own “identical” copy of the design. Further, to achieve consensus approval and publication of such a Test Method, it could be considered necessary that ILS results for this design include data from devices made by different entities. However, typical walkway tribometer designs (versus other types of test apparatus) are sufficiently complex that full documentation of all performance-affecting physical characteristics (sufficient that a reader could build one) may be impractical. European standard EN 16165 Annexes C and D illustrate what physical and performance characteristics are and are not documented in that standard’s specifications for two non-proprietary tribometers. In general, each different tribometer design may have advantages and disadvantages for testing different surfaces, and this Practice provides a rigorous and standardized structure for creating tribometer test procedures and interlaboratory study reports that would comply with the requirements fo...
SCOPE
1.1 This practice covers creation of interlaboratory study reports and test procedures for the use of portable walkway tribometers for obtaining walkway surface friction measurements.  
1.2 This practice does not address the interpretation of data relative to pedestrian safety.  
1.3 This practice does not address the suitability of a walkway surface for a particular application.  
1.4 This practice does not directly address the important issue of the frictional homogeneity and stability of reference materials and in-use walkway materials.  
1.5 Conformance to this practice does not result in an ASTM Test Method.  
1.6 Values stated in SI (metric) units are to be regarded as the standard. Values in parentheses are for information only.  
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-Mar-2024
• ICS: 93.080.20 - Road construction materials
• Technical Committee: F13 - Pedestrian/Walkway Safety and Footwear
• Drafting Committee: F13.10 - Traction

Relations

• Replaces: ASTM F3539-22 - Standard Practice for Creation of Walkway Tribometer Interlaboratory Study Reports and Test Procedures
• Effective Date: 01-Apr-2024
• Referred By: ASTM F1166-23 - Standard Practice for Human Engineering Design for Marine Systems, Equipment, and Facilities<rangeref></rangeref >
• Effective Date: 01-Apr-2024

Overview

ASTM F3539-24: Standard Practice for Creation of Walkway Tribometer Interlaboratory Study Reports and Test Procedures, establishes a comprehensive framework for documenting and conducting interlaboratory studies (ILS) and developing test procedures related to the use of portable walkway tribometers. Developed by ASTM Committee F13 on Pedestrian/Walkway Safety and Footwear, this practice outlines the steps necessary to ensure that walkway surface friction measurements using tribometers are consistent, transparent, and reproducible.

While ASTM F3539-24 does not itself create a formal ASTM Test Method, its standardized structure ensures that the ILS reports and test procedures generated are in line with the requirements applicable to ASTM Test Methods, particularly when proprietary or patented tribometers are involved. This standard is intended to support coordinators, such as manufacturers or researchers, in providing detailed and comparable data across multiple laboratories.

Key Topics

• Creation of Interlaboratory Study (ILS) Reports: Defines requirements for documenting every aspect of an ILS, including apparatus configuration, sourcing, test procedures, raw data, results, and statistical analyses.
• Standardized Test Procedures: Outlines content for creating detailed test procedures to ensure consistent walkway friction measurements in both laboratory and field conditions.
• Terminology and Definitions: Provides standardized definitions relevant to tribometer use, such as precision, bias, reference material, and friction.
• Documentation of Methodology: Specifies comprehensive reporting on equipment, reference and cleaning materials, contaminant details, testing directions, and more.
• Statistical Analysis: Requires ILS data to be assessed using recognized practices for precision and bias (referencing ASTM E177 and E691).
• Transparency and Comparability: Ensures users have access to detailed methodological information needed for direct comparison of test results.
• Limitations: Does not address interpretation of results related to pedestrian safety or the frictional homogeneity and stability of walkway surfaces and reference materials.

Applications

ASTM F3539-24 is highly valuable for organizations seeking to improve the consistency and credibility of walkway surface friction measurements. Practical applications include:

• Product Evaluation: Manufacturers can use the standard to document friction performance of flooring and walkway materials, supporting safety claims.
• Tribometer Validation: Laboratories and tribometer manufacturers can ensure their devices and procedures align with internationally recognized requirements.
• Interlaboratory Studies: Research organizations can coordinate multi-site studies, generating statistically robust data on friction measurement reproducibility and repeatability.
• Comparative Testing: Facility managers, safety consultants, and regulatory bodies can compare walkway tribometer results across different devices and testing scenarios, fostering trust in data-driven decisions.

The standard is particularly relevant for environments where pedestrian slip resistance and walkway safety are critical, such as commercial buildings, transit hubs, healthcare facilities, and public spaces.

Related Standards

ASTM F3539-24 references several important international and ASTM standards that underpin its procedures:

• ASTM E691 – Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
• ASTM E177 – Practice for Use of the Terms Precision and Bias in ASTM Test Methods
• ASTM F3132 – Practice for Selection of Walkway Surfaces When Considering Pedestrian Safety
• EN 16165 – Determination of Slip Resistance of Pedestrian Surfaces – Methods of Evaluation
• ISO Guide 30 – Reference materials: Selected terms and definitions
• ISO Guide 35 – Reference materials: Guidance for characterization and assessment of homogeneity and stability

Keywords

walkway tribometer, slip resistance, friction measurement, interlaboratory study, ASTM F3539-24, test procedure, pedestrian safety, coefficient of friction, walkway surface, tribometer test, ASTM standard, repeatability, reproducibility, research report, safety standard, flooring friction.

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: F3539 − 24
Standard Practice for
Creation of Walkway Tribometer Interlaboratory Study
Reports and Test Procedures
This standard is issued under the fixed designation F3539; 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 E177 Practice for Use of the Terms Precision and Bias in
ASTM Test Methods
1.1 This practice covers creation of interlaboratory study
E691 Practice for Conducting an Interlaboratory Study to
reports and test procedures for the use of portable walkway
Determine the Precision of a Test Method
tribometers for obtaining walkway surface friction measure-
F3132 Practice for Selection of Walkway Surfaces When
ments.
Considering Pedestrian Safety
1.2 This practice does not address the interpretation of data
2.2 Other Standards:
relative to pedestrian safety.
EN 16165 Determination of Slip Resistance of Pedestrian
1.3 This practice does not address the suitability of a
Surfaces – Methods of Evaluation
walkway surface for a particular application.
ISO Guide 30 Reference materials Selected terms and defi-
1.4 This practice does not directly address the important nitions
ISO Guide 35 Reference materials Guidance for character-
issue of the frictional homogeneity and stability of reference
materials and in-use walkway materials. ization and assessment of homogeneity and stability
1.5 Conformance to this practice does not result in an
3. Terminology
ASTM Test Method.
3.1 Definitions:
1.6 Values stated in SI (metric) units are to be regarded as
3.1.1 accepted reference value, n—a value that serves as an
the standard. Values in parentheses are for information only.
agreed-upon reference for comparison, and which is derived
1.7 This standard does not purport to address all of the
as: (1) a theoretical or established value, based on scientific
safety concerns, if any, associated with its use. It is the
principles, (2) an assigned or certified value, based on experi-
responsibility of the user of this standard to establish appro-
mental work of some national or international organization, or
priate safety, health, and environmental practices and deter-
(3) a consensus or certified value, based on collaborative
mine the applicability of regulatory limitations prior to use.
experimental work under the auspices of a scientific or
1.8 This international standard was developed in accor-
engineering group. E177
dance with internationally recognized principles on standard-
3.1.2 available friction, n—an inherent characteristic of a
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom- walkway surface that would result in measurable friction upon
the attempted or actual sliding of another object across that
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee. surface; can only be measured using a method, apparatus and
contaminant (if any) that have their own inherent influences on
2. Referenced Documents the measurement value itself. F3132
2.1 ASTM Standards:
3.1.3 bias, n—the difference between the expectation of the
test results and an accepted reference value. E177
3.1.4 friction, n—the resistance to sliding of one surface
This practice is under the jurisdiction of ASTM Committee F13 on Pedestrian/
across another surface; may be evaluated through different
Walkway Safety and Footwear and is the direct responsibility of Subcommittee
methodologies and described using different terms. F3132
F13.10 on Traction.
Current edition approved April 1, 2024. Published April 2024. Originally
3.1.5 precision, n—the closeness of agreements between
approved in 2022. Last previous edition approved in 2022 as F3539 – 22. DOI:
independent test results obtained under stipulated conditions.
10.1520/F3539-24.
E177
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3.1.6 reference material, n—material, sufficiently homoge-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. neous and stable with respect to one or more specified
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F3539 − 24
properties, which has been established to be fit for its intended also as required for an ASTM Test Method. The reason that
use in a measurement process. ISO Guide 30 the content of this Practice is not prepared as an actual ASTM
Test Method is as follows. ASTM regulations preclude refer-
3.2 Definitions of Terms Specific to This Standard:
ence (in a Standard) to patented or otherwise proprietary test
3.2.1 coordinator, n—an entity that works with a brand or
apparatus where “alternatives exist”. While a proprietary
type of walkway tribometer on behalf of users.
apparatus may be mentioned in the Test Method’s Research
3.2.1.1 Discussion—A coordinator is typically a
Report, this would prevent the Test Method from being a
manufacturer, distributor, laboratory, researcher, or representa-
standalone document containing all information necessary for
tive thereof.
testing. As such, a standalone Test Method could only be for a
3.2.2 field testing, n—friction testing conducted on walkway
non-proprietary apparatus design, with this design expressed in
materials in a non-laboratory setting.
terms of physical characteristics and performance specifica-
3.2.3 laboratory verification, n—a coordinator-defined pro- tions sufficient to enable the reader to fabricate their own
cedure for periodically confirming that a tribometer is perform- “identical” copy of the design. Further, to achieve consensus
ing within coordinator-defined parameters. approval and publication of such a Test Method, it could be
3.2.3.1 Discussion—The coordinator determines or ap- considered necessary that ILS results for this design include
data from devices made by different entities. However, typical
proves the interval between verifications, and the entities that
can complete the verification. Different terms may be used for walkway tribometer designs (versus other types of test appa-
ratus) are sufficiently complex that full documentation of all
the actual procedure.
performance-affecting physical characteristics (sufficient that a
3.2.4 slider, n—a mounted material on a walkway tribom-
reader could build one) may be impractical. European standard
eter that comes into frictional contact with the surface being
EN 16165 Annexes C and D illustrate what physical and
tested.
performance characteristics are and are not documented in that
3.2.5 user, n—the operator of an individual tribometer.
standard’s specifications for two non-proprietary tribometers.
3.2.6 user verification, n—the coordinator-defined proce-
In general, each different tribometer design may have advan-
dure for a user to verify that their individual tribometer is
tages and disadvantages for testing different surfaces, and this
performing and being operated within coordinator-defined
Practice provides a rigorous and standardized structure for
parameters.
creating tribometer test procedures and interlaboratory study
reports that would comply with the requirements for ASTM
4. Summary of Practice
Test Methods, were it practical to create such test methods. It
is recognized that a coordinator’s claim of compliance with
4.1 An understanding of a tribometer’s precision and bias is
this practice should be evaluated by the user, as formal
useful in evaluating how test results compare to the results of
consensus approval of the coordinator’s outputs will not have
others using different units of the same device. Precision can be
occurred.
determined using an interlaboratory study (ILS) conducted in
accordance with Practice E691; when an accepted reference 5.2 If compliance with this practice is claimed by a
coordinator, all steps in Section 6 shall have been followed.
value exists for a reference material, the bias of a test
procedure or laboratory result can be evaluated. See Practices
5.3 The user can benefit from ILS reports and test proce-
E177 and E691 for discussions of these terms and topics.
dures prepared in compliance with this standard, as there are
Evaluating the comparability of ILS results to subsequent
potentially ~150 different elements (in Annex A1) of apparatus
friction testing, whether in the laboratory or field, is more
and methodological specifics, and it is important to note that
straightforward when (1) the ILS test procedure and apparatus
the burden for specifying this information rests with the
details are thoroughly documented, and (2) the ILS is con-
coordinator, not the user. The information will be there for the
ducted in a manner consistent with a coordinator-published
user if they want it.
test procedure. This practice provides a formalized framework
5.4 Precision statistics obtained in an ILS conducted on a
for:
single sample of a particular reference material will not capture
4.1.1 Preparation of a coordinator-published ILS report that
the frictional variability that exists between different samples
documents apparatus configuration details, apparatus sourcing
of that same reference material. The ILS test procedure may
details, test procedure, raw data, and results from that study;
not capture the frictional variability that exists within a single
and
sample of that reference material. The ILS test procedure will
4.1.2 Preparation of a coordinator-published test procedure
not evaluate the stability of the frictional characteristics of a
suitable for field testing with sufficient detail to facilitate direct
reference material with repeated use over time. While outside
comparison of such testing with ILS results.
the scope of this practice, the homogeneity and stability of
reference materials are relevant to the interpretation and
5. Significance and Use
utilization of ILS results. Refer to ISO Guide 35 for a
5.1 The test procedures and interlaboratory study report that
discussion of these topics.
result from coordinator compliance with this Practice are
intended to include all information required for an ASTM Test
Method and its associated Research Report; the interlaboratory
Refer to Form and Style for ASTM Standards Section A21.2.2.
study is to be conducted in compliance with Practice E691, Refer to Regulations Governing ASTM Technical Committees Section 15.
F3539 − 24
5.5 Friction measurements represent characteristics of a ducibility standard deviation, repeatability limit, and reproduc-
surface at the time of testing; the available friction of the ibility limit for each ILS reference material.
surface after use may change significantly. As with reference 6.1.2.11 A tabulation of the Practice E691 Section 15-
materials, the measured friction of one sample of a manufac- derived h and k consistency statistics for each ILS reference
tured walkway surface may not represent the friction of other material, for each laboratory.
samples of the same product.
6.2 A test procedure shall be published (via the coordina-
5.6 Obtaining test results is one part of a multi-part process tor’s website or similar) that documents the following infor-
of determining whether the available friction of an underfoot mation:
surface is adequate. Appendix X1 outlines a set of standards 6.2.1 The date of publication or other revision designator
the F13.10 subcommittee intends to develop towards this goal. for the test procedure.
6.2.2 Tribometer Information per A1.2.
6. Procedure
6.2.3 Contaminant Information per A1.5.
6.2.4 General Information for Field Testing per A1.8.
6.1 The coordinator shall conduct an ILS for a single
tribometer model/configuration in accordance with Practice 6.2.5 Reference Material Information for Use in User Veri-
E691, subject to the following requirements: fication per A1.9.
6.2.6 Cleaning Supplies for User Verification Reference
6.1.1 No individual tribometer unit, individual slider unit, or
operator shall contrib
...

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: F3539 − 22 F3539 − 24
Standard Practice for
Creation of Walkway Tribometer Interlaboratory Study
Reports and Test Procedures
This standard is issued under the fixed designation F3539; 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 covers creation of interlaboratory study reports and test procedures for the use of portable walkway tribometers
for obtaining walkway surface friction measurements.
1.2 This practice does not address the interpretation of data relative to pedestrian safety.
1.3 This practice does not address the suitability of a walkway surface for a particular application.
1.4 This practice does not directly address the important issue of the frictional homogeneity and stability of reference materials
and in-use walkway materials.
1.5 Conformance to this practice does not result in an ASTM Test Method.
1.6 Values stated in SI (metric) units are to be regarded as the standard. Values in parentheses are for information only.
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.
2. Referenced Documents
2.1 ASTM Standards:
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
F3132 Practice for Selection of Walkway Surfaces When Considering Pedestrian Safety
2.2 Other Standards:
EN 16165 Determination of Slip Resistance of Pedestrian Surfaces – Methods of Evaluation
ISO Guide 30 Reference materials Selected terms and definitions
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 Feb. 1, 2022April 1, 2024. Published March 2022April 2024. Originally approved in 2022. Last previous edition approved in 2022 as F3539 – 22.
DOI: 10.1520/F3539-22.10.1520/F3539-24.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. 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
F3539 − 24
ISO Guide 35 Reference materials Guidance for characterization and assessment of homogeneity and stability
3. Terminology
3.1 Definitions:
3.1.1 accepted reference value, n—a value that serves as an agreed-upon reference for comparison, and which is derived as: (1)
a theoretical or established value, based on scientific principles, (2) an assigned or certified value, based on experimental work of
some national or international organization, or (3) a consensus or certified value, based on collaborative experimental work under
the auspices of a scientific or engineering group. E177
3.1.2 available friction, n—an inherent characteristic of a walkway surface that would result in measurable friction upon the
attempted or actual sliding of another object across that surface; can only be measured using a method, apparatus and contaminant
(if any) that have their own inherent influences on the measurement value itself. F3132
3.1.3 bias, n—the difference between the expectation of the test results and an accepted reference value. E177
3.1.4 friction, n—the resistance to sliding of one surface across another surface; may be evaluated through different methodologies
and described using different terms. F3132
3.1.5 precision, n—the closeness of agreements between independent test results obtained under stipulated conditions. E177
3.1.6 reference material, n—material, sufficiently homogeneous and stable with respect to one or more specified properties, which
has been established to be fit for its intended use in a measurement process. ISO Guide 30
3.2 Definitions of Terms Specific to This Standard:
3.2.1 coordinator, n—an entity that produces the interlaboratory study report and test procedures required by this practice.works
with a brand or type of walkway tribometer on behalf of users.
3.2.1.1 Discussion—
A coordinator is typically a manufacturer, distributor, laboratory, researcher, or representative thereof.
3.2.2 field testing, n—friction testing conducted on walkway materials in a non-laboratory setting.
3.2.3 laboratory verification, n—a coordinator-defined procedure for periodically confirming that a tribometer is performing
according to defined specifications.within coordinator-defined parameters.
3.2.3.1 Discussion—
The coordinator determines or approves the interval between verifications, and the entities that can complete the verification.
Different terms may be used for the actual procedure.
3.2.4 slider, n—a mounted material on a walkway tribometer that comes into frictional contact with the surface being tested.
3.2.5 user, n—the operator of an individual tribometer.
3.2.6 user verification, n—the coordinator-defined procedure for a user to verify that their individual tribometer is performing and
being operated within coordinator-defined parameters.
4. Summary of Practice
4.1 An understanding of a tribometer’s precision and bias is useful in evaluating how test results compare to the results of others
using different units of the same device. Precision can be determined using an interlaboratory study (ILS) conducted in accordance
with Practice E691; when an accepted reference value exists for a reference material, the bias of a test procedure or laboratory
result can be evaluated. See Practices E177 and E691 for discussions of these terms and topics. Evaluating the comparability of
ILS results to subsequent friction testing, whether in the laboratory or field, is more straightforward when (1) the ILS test procedure
and apparatus details are thoroughly documented, and (2) the ILS is conducted in a manner consistent with a coordinator-published
test procedure. This practice provides a formalized framework for:
F3539 − 24
4.1.1 Preparation of a coordinator-published ILS report that documents apparatus configuration details, apparatus sourcing details,
test procedure, raw data, and results from that study; and
4.1.2 Preparation of a coordinator-published test procedure suitable for field testing with sufficient detail to facilitate direct
comparison of such testing with ILS results.
5. Significance and Use
5.1 The test procedures and interlaboratory study report that result from coordinator compliance with this Practice are intended
to include all information required for an ASTM Test Method and its associated Research Report; the interlaboratory study is to
be conducted in compliance with Practice E691, also as required for an ASTM Test Method. The reason that the content of this
Practice is not prepared as an actual ASTM Test Method is as follows. ASTM regulations preclude reference (in a Standard) to
patented or otherwise proprietary test apparatus where “alternatives exist”. While a proprietary apparatus may be mentioned in
the Test Method’s Research Report, this would prevent the Test Method from being a standalone document containing all
information necessary for testing. As such, a standalone Test Method could only be for a non-proprietary apparatus design, with
this design expressed in terms of physical characteristics and performance specifications sufficient to enable the reader to fabricate
their own “identical” copy of the design. Further, to achieve consensus approval and publication of such a Test Method, it could
be considered necessary that ILS results for this design include data from devices made by different entities. However, typical
walkway tribometer designs (versus other types of test apparatus) are sufficiently complex that full documentation of all
performance-affecting physical characteristics (sufficient that a reader could build one) may be impractical. European standard EN
16165 Annexes C and D illustrate what physical and performance characteristics are and are not documented in that standard’s
specifications for two non-proprietary tribometers. In general, each different tribometer design may have advantages and
disadvantages for testing different surfaces, and this Practice provides a rigorous and standardized structure for creating tribometer
test procedures and interlaboratory study reports that would comply with the requirements for ASTM Test Methods, were it
practical to create such test methods. It is recognized that a coordinator’s claim of compliance with this practice should be
evaluated by the user, as formal consensus approval of the coordinator’s outputs will not have occurred.
5.2 If compliance with this practice is claimed by a coordinator, all steps in Section 6 shall have been followed.
5.3 The user can benefit from ILS reports and test procedures prepared in compliance with this standard, as there are potentially
~150 different elements (in Annex A1) of apparatus and methodological specifics, and it is important to note that the burden for
specifying this information rests with the coordinator, not the user. The information will be there for the user if they want it.
5.4 Precision statistics obtained in an ILS conducted on a single sample of a particular reference material will not capture the
frictional variability that exists between different samples of that same reference material. The ILS test procedure may not capture
the frictional variability that exists within a single sample of that reference material. The ILS test procedure will not evaluate the
stability of the frictional characteristics of a reference material with repeated use over time. While outside the scope of this practice,
the homogeneity and stability of reference materials are relevant to the interpretation and utilization of ILS results. Refer to ISO
Guide 35 for a discussion of these topics.
5.5 Friction measurements represent characteristics of a surface at the time of testing; the available friction of the surface after
use may change significantly. As with reference materials, the measured friction of one sample of a manufactured walkway surface
may not represent the friction of other samples of the same product.
5.6 Obtaining test results is one part of a multi-part process of determining whether the available friction of an underfoot surface
is adequate. Appendix X1 outlines a set of standards the F13.10 subcommittee intends to develop towards this goal.
6. Procedure
6.1 The coordinator shall conduct an ILS for a single tribometer model/configuration in accordance with Practice E691, subject
to the following requirements:
6.1.1 No individual tribometer unit, individual slider unit, or operator shall contribute to more than one laboratory’s data.
Refer to Form and Style for ASTM Standards Section A21.2.2.
Refer to Regulations Governing ASTM Technical Committees Section 15.
F3539 − 24
6.1.2 An ILS report shall be published (via the coordinator’s website or similar) that documents the following information:
6.1.2.1 ILS General Information per A1.1.
6.1.2.2 Tribometer Information per A1.2.
6.1.2.3 ILS Reference Material Information per A1.3.
6.1.2.4 Cleaning Supplies for ILS Reference Materials per A1.4.
6.1.2.5 Contaminant Information per A1.5.
6.1.2.6 Friction Test Procedure for ILS per A1.6. If a written test procedure was provided to operators, include it in the ILS report.
6.1.2.7 Data Conversion Instructions per A1.7.
6.1.2.8 A tabulation of all test observations, sorted by laboratory and by test order. This may be omitted if no conversion is needed
between test observations and test results. Data shall not be identifiable as to t
...