ASTM D2719-19
(Test Method)Standard Test Methods for Wood Structural Panels in Shear Through-the-Thickness
Standard Test Methods for Wood Structural Panels in Shear Through-the-Thickness
SIGNIFICANCE AND USE
3.1 The strength and modulus of rigidity of wood structural panels in shear through-the-thickness obtained by these test methods are required for the rigorous design of many lumber-panel structural components such as trusses with panel gussets, box beams, folded plate roofs, and space plane structures, as well as floor and roof diaphragms, and shear walls. These properties are of secondary importance in typical roof deck and sheathing applications, and in crates and shipping containers.
3.2 Veneer produced by slicing or rotary peeling may contain fine checks or separations parallel to the grain on the knife side of the veneer that are produced as the knife is forced through the wood. These checks are termed “knife checks” to distinguish them from occasional checks that may be formed on the opposite side of the veneer by forces at the compression bar, and from checks caused by drying. Average depth of knife checks has been found to strongly influence shear properties in plywood panels and may be of significance in veneer incorporated in composite panels. Measurement of depth of knife checks is recommended in these test methods.
3.3 To control or define other variables influencing shear properties, these test methods require determination of moisture content and elapsed time to failure. The conditioning of test material in controlled atmosphere and determination of specific gravity are recommended.
SCOPE
1.1 These test methods determine the shear through-the-thickness properties of wood structural panels associated with shear distortion of the major axis. Wood structural panels in use include plywood, oriented strand board, and composites of veneer and of wood-based layers. Three test methods are included which differ somewhat in their application:
Test Method
Section
A. Small Panel Shear Test
5
B. Large Panel Shear Test
6
C. Two-Rail Shear Test
7
The choice of test method will be determined in part by the purpose of the tests, characteristics of test material, and equipment availability. In general, Test Method B or C for large specimens is preferred when equipment, amount of test material, and experimental plan permit.
1.1.1 Test Method A: Small Panel Shear Test—This test method is suitable for testing small samples of uniform material including investigations of the effects of grain direction or orientation and of many raw materials and manufacturing process variables which influence shear properties uniformly throughout the specimen. The test method is unsuited for determining effects of grade and manufacturing features such as density variations, knots, and core gaps within the specimen.
1.1.2 Test Method B: Large Panel Shear Test—This test method is regarded as giving the most accurate modulus of rigidity and is therefore recommended for elastic tests of materials to be used in stress analysis studies of test structures. This test method also yields excellent shear strength values for clear material. However, in spite of the large size of the specimen, failures generally occur only in narrow zones at the perimeter of the test area. This characteristic, a result of the heavy perimeter framing, causes this test method to be generally unsuited for determining grade and manufacturing effects such as density variations, core gaps, and knots that are not uniformly distributed throughout the panel. Generally, only in cases where effects of these factors under conditions of heavy perimeter framing are desired, should the test method be applied.
1.1.3 Test Method C: Two-Rail Shear Test—This test method is applicable to a wide variety of materials and problems. The specimen fabrication and test procedures are somewhat simpler than in Test Methods A and B. The specimen is free to shear parallel to its 24-in. (610-mm) length dimension anywhere within the 8-in. (203-mm) width between rails. Thus, the test method is well suited for determining grade and...
General Information
Relations
Buy Standard
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: D2719 − 19
Standard Test Methods for
1
Wood Structural Panels in Shear Through-the-Thickness
This standard is issued under the fixed designation D2719; 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 uniformly distributed throughout the panel. Generally, only in
cases where effects of these factors under conditions of heavy
1.1 These test methods determine the shear through-the-
perimeter framing are desired, should the test method be
thickness properties of wood structural panels associated with
applied.
sheardistortionofthemajoraxis.Woodstructuralpanelsinuse
1.1.3 Test Method C: Two-Rail Shear Test—This test
include plywood, oriented strand board, and composites of
method is applicable to a wide variety of materials and
veneer and of wood-based layers. Three test methods are
problems. The specimen fabrication and test procedures are
included which differ somewhat in their application:
somewhatsimplerthaninTestMethodsAandB.Thespecimen
Test Method Section
isfreetoshearparalleltoits24-in.(610-mm)lengthdimension
A. Small Panel Shear Test 5
B. Large Panel Shear Test 6
anywherewithinthe8-in.(203-mm)widthbetweenrails.Thus,
C. Two-Rail Shear Test 7
the test method is well suited for determining grade and
The choice of test method will be determined in part by the
manufacturing effects such as core gaps and knots occupying
purpose of the tests, characteristics of test material, and
and affecting small areas. The test method is not so ideally
equipmentavailability.Ingeneral,TestMethodBorCforlarge
suited for determination of modulus of rigidity, but when
specimens is preferred when equipment, amount of test
adjusted for strain distribution effects, values approximating
material, and experimental plan permit.
those obtained by Test Method B result. The test method
1.1.1 Test Method A: Small Panel Shear Test—This test
simulates effects of heavy framing when expected planes of
method is suitable for testing small samples of uniform
weakness are oriented perpendicular to rails and no framing at
material including investigations of the effects of grain direc-
all when parallel to rails.
tion or orientation and of many raw materials and manufactur-
NOTE1—Asmallerscaleversionbasedontheprinciplesofthistwo-rail
ing process variables which influence shear properties uni-
shear method is contained in Test Methods D1037 Section 27. The results
formly throughout the specimen. The test method is unsuited
from Test Methods D1037 Section 27 may not be equivalent to the results
for determining effects of grade and manufacturing features
from Test Methods D2719 Method C.
such as density variations, knots, and core gaps within the
1.2 Significant differences, moderate to small in magnitude,
specimen.
among the three test methods have been found to exist when
1.1.2 Test Method B: Large Panel Shear Test—This test
these test methods are applied to plywood of clear straight-
method is regarded as giving the most accurate modulus of
grained veneers. Therefore, when comparisons are made
rigidity and is therefore recommended for elastic tests of
among test results, it is recommended that the same test
materials to be used in stress analysis studies of test structures.
method be used throughout.
This test method also yields excellent shear strength values for
clear material. However, in spite of the large size of the
1.3 This standard does not purport to address all of the
specimen, failures generally occur only in narrow zones at the
safety concerns, if any, associated with its use. It is the
perimeter of the test area. This characteristic, a result of the
responsibility of the user of this standard to establish appro-
heavy perimeter framing, causes this test method to be gener-
priate safety, health, and environmental practices and deter-
ally unsuited for determining grade and manufacturing effects
mine the applicability of regulatory limitations prior to use.
such as density variations, core gaps, and knots that are not
1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard-
1
These test methods are under the jurisdiction of ASTM Committee D07 on
ization established in the Decision on Principles for the
Wood and are the direct responsibility of Subcommittee D07.03 on Panel Products.
Development of International Standards, Guides and Recom-
Current edition approved April 1, 2019. Published June
...
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: D2719 − 13 D2719 − 19
Standard Test Methods for
1
Wood Structural Panels in Shear Through-the-Thickness
This standard is issued under the fixed designation D2719; 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 These test methods determine the shear through-the-thickness properties of wood structural panels associated with shear
distortion of the major axis. Structural Wood structural panels in use include plywood, oriented strand board, and composites of
veneer and of wood based wood-based layers. Three test methods are included which differ somewhat in their application:
Test Method Section
A. Small Panel Shear Test 5
B. Large Panel Shear Test 6
C. Two Rail Shear Test 7
C. Two-Rail Shear Test 7
The choice of test method will be determined in part by the purpose of the tests, characteristics of test material, and equipment
availability. In general, Test Method B or C for large specimens is preferred when equipment, amount of test material, and
experimental plan permit.
1.1.1 Test Method A: Small Panel Shear Test—This test method is suitable for testing small samples of uniform material
including investigations of the effects of grain direction or orientation and of many raw materials and manufacturing process
variables which influence shear properties uniformly throughout the specimen. The test method is unsuited for determining effects
of grade and manufacturing features such as density variations, knots, and core gaps within the specimen.
1.1.2 Test Method B: Large Panel Shear Test—This test method is regarded as giving the most accurate modulus of rigidity and
is therefore recommended for elastic tests of materials to be used in stress analysis studies of test structures. This test method also
yields excellent shear strength values for clear material. However, in spite of the large size of the specimen, failures generally occur
only in narrow zones at the perimeter of the test area. This characteristic, a result of the heavy perimeter framing, causes this test
method to be generally unsuited for determining grade and manufacturing effects such as density variations, core gaps, and knots
that are not uniformly distributed throughout the panel. Generally, only in cases where effects of these factors under conditions of
heavy perimeter framing are desired, should the test method be applied.
1.1.3 Test Method C: Two-Rail Shear Test—This test method is applicable to a wide variety of materials and problems. The
specimen fabrication and test procedures are somewhat simpler than in Test Methods A and B. The specimen is free to shear
parallel to its 24-in.(610-mm) 24-in. (610-mm) length dimension anywhere within the 8-in. (203-mm) width between rails. Thus,
the test method is well suited for determining grade and manufacturing effects such as core gaps and knots occupying and affecting
small areas. The test method is not so ideally suited for determination of modulus of rigidity, but when adjusted for strain
distribution effects, values approximating those obtained by Test Method B result. The test method simulates effects of heavy
framing when expected planes of weakness are oriented perpendicular to rails and no framing at all when parallel to rails.
NOTE 1—A smaller scale version based on the principles of this two rail two-rail shear method is contained in Test Methods D1037 sectionSection 27.
The results from Test Methods D1037 sectionSection 27 may not be equivalent to the results from Test Methods D2719 Method C.
1.2 Significant differences, moderate to small in magnitude, among the three test methods have been found to exist when these
test methods are applied to plywood of clear straight-grained veneers. Therefore, when comparisons are made among test results,
it is recommended that the same test method be used throughout.
1.3 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.