ASTM D8019-23
(Test Method)Standard Test Methods for Determining the Full Section Flexural Modulus and Bending Strength of Fiber Reinforced Polymer Crossarms Assembled with Center Mount Brackets
Standard Test Methods for Determining the Full Section Flexural Modulus and Bending Strength of Fiber Reinforced Polymer Crossarms Assembled with Center Mount Brackets
SIGNIFICANCE AND USE
5.1 Determination of the flexural modulus, beam bending strength and full assembly strength, by this test method is especially useful for product validation, design and specification purposes.
5.2 Calculated values for flexural modulus, bending strength and full assembly strength will vary with specimen depth, span length, hole configurations, loading rate, and ambient test temperature. A minimum span to depth ratio of 16:1 is required for establishing the flexural modulus, wherein shear deformation effects are neglected.
5.3 Validity—Stress at failure, σ, is only valid for crossarm failures due to local compression buckling. Other controlling modes of failure will dictate the ultimate phase loading capacities. For example, in-plane shear, fastener pin bearing, position hardware, center mount failures and fastener pull out will dictate the failure mode and the crossarm capacity.
SCOPE
1.1 These test methods cover the determination of the flexural modulus and bending strength of both the tangent and deadend Fiber Reinforced Polymer (FRP) composite crossarms loaded perpendicular to the plane of minor and major axes. One method covers testing of assembled tangent crossarms including the tangent bracket and relative hardware. The other method covers testing of assembled deadend crossarms with a deadend bracket and relative phase loading hardware. The failure modes and associated stresses can be used for predicting the phase load capacities of pultruded crossarms specific to certain conductor loading scenarios exerted by conductors.
1.2 The test data described in this standard can be used for predicting the vertical and horizontal component loads of deadend and tangent arms. Both deadend and tangent crossarms shall be tested in the two configurations described in Figures 1 and 2, respectively. This will permit the manufacturers to publish both vertical and horizontal design capacities for deadend crossarm configurations so that two way bending stresses, caused by catenary effects, can be considered when developing the capacity of the deadend crossarms by utility design engineers and manufacturers.
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.
1.4 This standard will not address all factors that affect the phase loading capacity.
1.5 This standard does not address the use of core materials that are added to increase the structural capacity of the crossarms. Contribution of core materials shall not be considered within the calculations provided in this standard. Use of core material properties in design computations to identify improvement in design strengths of crossarms is the sole responsibility of the designee in-charge of the project.
1.6 Torsional effects occurring during standard in service usage are not considered within this standard.
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.
Note 1: There is no known ISO equivalent to this standard.
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.
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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: D8019 − 23
Standard Test Methods for
Determining the Full Section Flexural Modulus and Bending
Strength of Fiber Reinforced Polymer Crossarms
1
Assembled with Center Mount Brackets
This standard is issued under the fixed designation D8019; 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* ered within the calculations provided in this standard. Use of
core material properties in design computations to identify
1.1 These test methods cover the determination of the
improvement in design strengths of crossarms is the sole
flexural modulus and bending strength of both the tangent and
responsibility of the designee in-charge of the project.
deadend Fiber Reinforced Polymer (FRP) composite crossarms
loaded perpendicular to the plane of minor and major axes.
1.6 Torsional effects occurring during standard in service
One method covers testing of assembled tangent crossarms
usage are not considered within this standard.
including the tangent bracket and relative hardware. The other
1.7 This standard does not purport to address all of the
method covers testing of assembled deadend crossarms with a
safety concerns, if any, associated with its use. It is the
deadend bracket and relative phase loading hardware. The
responsibility of the user of this standard to establish appro-
failure modes and associated stresses can be used for predicting
priate safety, health, and environmental practices and deter-
the phase load capacities of pultruded crossarms specific to
mine the applicability of regulatory limitations prior to use.
certain conductor loading scenarios exerted by conductors.
1.2 The test data described in this standard can be used for NOTE 1—There is no known ISO equivalent to this standard.
predicting the vertical and horizontal component loads of
1.8 This international standard was developed in accor-
deadend and tangent arms. Both deadend and tangent cros-
dance with internationally recognized principles on standard-
sarms shall be tested in the two configurations described in
ization established in the Decision on Principles for the
Figures 1 and 2, respectively. This will permit the manufactur-
Development of International Standards, Guides and Recom-
ers to publish both vertical and horizontal design capacities for
mendations issued by the World Trade Organization Technical
deadend crossarm configurations so that two way bending
Barriers to Trade (TBT) Committee.
stresses, caused by catenary effects, can be considered when
developing the capacity of the deadend crossarms by utility
2. Referenced Documents
design engineers and manufacturers.
2
2.1 ASTM Standards:
1.3 The values stated in either SI units or inch-pound units
D883 Terminology Relating to Plastics
are to be regarded separately as standard. The values stated in
D4968 Practice for Annual Review of Test Methods and
each system may not be exact equivalents; therefore, each
Specifications for Plastics
system shall be used independently of the other. Combining
E4 Practices for Force Calibration and Verification of Test-
values from the two systems may result in nonconformance
ing Machines
with the standard.
E177 Practice for Use of the Terms Precision and Bias in
1.4 This standard will not address all factors that affect the
ASTM Test Methods
phase loading capacity.
E456 Terminology Relating to Quality and Statistics
1.5 This standard does not address the use of core materials
E691 Practice for Conducting an Interlaboratory Study to
that are added to increase the structural capacity of the Determine the Precision of a Test Method
crossarms. Contribution of core materials shall not be consid-
E2935 Practice for Evaluating Equivalence of Two Testing
Processes
1
This test method is under the jurisdiction of ASTM Committee D20 on Plastics
and is the direct responsibility of Subcommittee D20.18 on Reinforced Thermoset-
2
ting Plastics. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Nov. 1, 2023. Published November 2023. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 2015. Last previous edition approved in 2015 as D8019 – 15. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/D8019-23. the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West C
...
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: D8019 − 15 D8019 − 23
Standard Test Methods for
Determining the Full Section Flexural Modulus and Bending
Strength of Fiber Reinforced Polymer Crossarms
1
Assembled with Center Mount Brackets
This standard is issued under the fixed designation D8019; 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 Scope*
1.1 These test methods cover the determination of the flexural modulus and bending strength of both the tangent and deadend arms
bent about their Fiber Reinforced Polymer (FRP) composite crossarms loaded perpendicular to the plane of minor and major axes.
One method covers testing of assembled tangent crossarms including the tangent bracket and relative hardware. The other method
covers testing of assembled deadend crossarms with a deadend bracket and relative phase loading hardware. The failure modes
and associated stresses can be used for predicting the phase load capacities of pultruded crossarms specific to certain conductor
loading scenarios.scenarios exerted by conductors.
1.2 The test methodsdata described in this standard can be used for predicting the vertical and horizontal component loads of
deadend and tangent arms. Both deadend and tangent crossarms shall be tested in the two configurations described in Figures 1
and 2. 2, respectively. This will permit the manufacturesmanufacturers to publish both vertical and horizontal design capacities for
deadend crossarm configurations so that two way bending stresses, caused by catenary effects, can be considered when developing
the capacity of the deadend crossarms by utility design engineers and manufacturers.
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the
two systems may result in nonconformance with the standard.
1.4 This standard will not address all factors that affect the phase loading capacity.
1.5 This standard does not address the use of core materials that are added to increase the structural capacity of the crossarms.
Core material Contribution of core materials shall not be considered inwithin the calculations provided in this standard. Use of core
material properties in design computations to identify improvement in design strengths of crossarms is the sole responsibility of
the designee in-charge of the project.
1.6 Torsional effects occurring during standard in service usage are not considered within this standard.
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 healthsafety, health, and environmental practices and determine
the applicability of regulatory limitations prior to use.
1
This test method is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.18 on Reinforced Thermosetting
Plastics.
Current edition approved Dec. 1, 2015Nov. 1, 2023. Published January 2016November 2023. Originally approved in 2015. Last previous edition approved in 2015 as
D8019 – 15. DOI: 10.1520/D8019-15.10.1520/D8019-23.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D8019 − 23
NOTE 1—There is no known ISO equivalent to this standard.
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
2.1 ASTM Standards:
D883 Terminology Relating to Plastics
D4968 Practice for Annual Review of Test Methods and Specifications for Plastics
E4 Practices for Force Calibration and Verification of Testing Machines
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E456 Terminology Relating to Quality and Statistics
E691 Practice for Conducting an Interlaboratory Stu
...
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