ASTM D3043-17
(Test Method)Standard Test Methods for Structural Panels in Flexure
Standard Test Methods for Structural Panels in Flexure
SIGNIFICANCE AND USE
3.1 These methods give the flexural properties, principally strength and stiffness, of structural panels. These properties are of primary importance in most structural uses of panels whether in construction for floors, wall sheathing, roof decking, concrete form, or various space plane structures; packaging and materials handling for containers, crates, or pallets; or structural components such as stress-skin panels.
3.2 To control or define other variables influencing flexure properties, moisture content and time to failure must be determined. Conditioning of test material at controlled atmospheres to control test moisture content and determination of specific gravity are recommended. Comparisons of results of plywood, veneer composites, and laminates with solid wood or other plywood constructions will be greatly assisted if the thickness of the individual plies is measured to permit computation of section properties.
SCOPE
1.1 These test methods determine the flexural properties of strips cut from structural panels or panels up to 4 by 8 ft in size. Structural panels in use include plywood, waferboard, oriented strand board, and composites of veneer and of wood-based layers. Four methods of tests are included:
Sections
Method A—Center-Point Flexure Test
5
Method B—Two-Point Flexure Test
6
Method C—Large Panel Test
7
Method D—Flexure Test for Quality Assurance
8
The choice of method will be dictated by the purpose of the test, type of material, and equipment availability. All methods are applicable to material that is relatively uniform in strength and stiffness properties. Only Method C should be used to test material suspected of having strength or stiffness variations within a panel caused by density variations, knots, knot-holes, areas of distorted grain, fungal attack, or wide growth variations. However, Method B may be used to evaluate certain features such as core gaps and veneer joints in plywood panels where effects are readily projected to full panels. Method C generally is preferred where size of test material permits. Moments applied to fail specimens tested by Method A, B or D in which large deflections occur can be considerably larger than nominal. An approximate correction can be made.
1.2 Method A, Center-Point Flexure Test—This method is applicable to material that is uniform with respect to elastic and strength properties. Total deflection, and modulus of elasticity computed from it, include a relatively constant component attributable to shear deformation. It is well suited to investigations of many variables that influence properties uniformly throughout the panel in controlled studies and to test small, defect-free control specimens cut from large panels containing defects tested by the large-specimen method.
1.3 Method B, Two-Point Flexure Test—This method, like Method A, is suited to the investigation of factors that influence strength and elastic properties uniformly throughout the panel, in controlled studies, and to testing small, defect free control specimens cut from large specimens tested by Method C. However, it may be used to determine the effects of finger joints, veneer joints and gaps, and other features which can be placed entirely between the load points and whose effects can be projected readily to full panel width. Deflection and modulus of elasticity obtained from this method are related to flexural stress only and do not contain a shear component. Significant errors in modulus of rupture can occur when nominal moment is used (see Appendix X1).
1.4 Method C, Large Panel Test—This method is ideally suited for evaluating effects of knots, knot-holes, areas of sloping grain, and patches for their effect on standard full-size panels. It is equally well suited for testing uniform or clear material whenever specimen size is adequate. Specimen size and span above certain minimums are quite flexibl...
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: D3043 − 17
Standard Test Methods for
1
Structural Panels in Flexure
This standard is issued under the fixed designation D3043; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope in controlled studies, and to testing small, defect free control
specimens cut from large specimens tested by Method C.
1.1 These test methods determine the flexural properties of
However, it may be used to determine the effects of finger
stripscutfromstructuralpanelsorpanelsupto4by8ftinsize.
joints, veneer joints and gaps, and other features which can be
Structural panels in use include plywood, waferboard, oriented
placed entirely between the load points and whose effects can
strand board, and composites of veneer and of wood-based
be projected readily to full panel width. Deflection and
layers. Four methods of tests are included:
modulus of elasticity obtained from this method are related to
Sections
flexural stress only and do not contain a shear component.
Method A—Center-Point Flexure Test 5 Significant errors in modulus of rupture can occur when
Method B—Two-Point Flexure Test 6
nominal moment is used (see Appendix X1).
Method C—Large Panel Test 7
Method D—Flexure Test for Quality Assurance 8
1.4 Method C, Large Panel Test—This method is ideally
The choice of method will be dictated by the purpose of the
suited for evaluating effects of knots, knot-holes, areas of
test, type of material, and equipment availability. All methods
sloping grain, and patches for their effect on standard full-size
are applicable to material that is relatively uniform in strength
panels. It is equally well suited for testing uniform or clear
and stiffness properties. Only Method C should be used to test
material whenever specimen size is adequate. Specimen size
material suspected of having strength or stiffness variations
and span above certain minimums are quite flexible. It is
within a panel caused by density variations, knots, knot-holes,
preferred when equipment is available.
areas of distorted grain, fungal attack, or wide growth varia-
1.5 Method D, Flexure Test for Quality Assurance—This
tions. However, Method B may be used to evaluate certain
method, like Method A, is well suited to the investigation of
features such as core gaps and veneer joints in plywood panels
factors that influence bending strength and stiffness properties.
where effects are readily projected to full panels. Method C
Also like Method A, this method uses small specimens in a
generally is preferred where size of test material permits.
center-pointsimplespantestconfiguration.Thismethodusesa
MomentsappliedtofailspecimenstestedbyMethodA,BorD
span to depth ratio, specimen width, test fixture and test speed
in which large deflections occur can be considerably larger
that make the method well suited for quality assurance. The
than nominal. An approximate correction can be made.
method is frequently used for quality assurance testing of
1.2 Method A, Center-Point Flexure Test—This method is
oriented strand board.
applicabletomaterialthatisuniformwithrespecttoelasticand
1.6 All methods can be used to determine modulus of
strength properties. Total deflection, and modulus of elasticity
elasticity with sufficient accuracy. Modulus of rupture deter-
computed from it, include a relatively constant component
mined by Methods A, B or D is subject to errors up to and
attributable to shear deformation. It is well suited to investi-
sometimes exceeding 20% depending upon span, loading, and
gations of many variables that influence properties uniformly
deflectionatfailureunlessmomentiscomputedintherigorous
throughout the panel in controlled studies and to test small,
manner outlined in Appendix X1 or corrections are made in
defect-free control specimens cut from large panels containing
other ways. These errors are not present in Method C.
defects tested by the large-specimen method.
1.7 Whencomparisonsaredesiredbetweenresultsofspeci-
1.3 Method B, Two-Point Flexure Test—This method, like
men groups, it is good practice to use the same method of test
MethodA,issuitedtotheinvestigationoffactorsthatinfluence
for all specimens, thus eliminating possible differences relat-
strength and elastic properties uniformly throughout the panel,
able to test method.
1.8 This standard does not purport to address all of the
1
These methods are under the jurisdiction of ASTM Committee D07 on Wood
safety concerns, if any, associated with its u
...
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: D3043 − 00 (Reapproved 2011) D3043 − 17
Standard Test Methods for
1
Structural Panels in Flexure
This standard is issued under the fixed designation D3043; 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 flexural properties of strips cut from structural panels or panels up to 4 by 8 ft in size.
Structural panels in use include plywood, waferboard, oriented strand board, and composites of veneer and of wood-based layers.
Four methods of tests are included:
Sections
Method A—Center-Point Flexure Test 5
Method B—Two-Point Flexure Test 6
Method C—Large Panel Test 7
Method D—Flexure Test for Quality Assurance 8
The choice of method will be dictated by the purpose of the test, type of material, and equipment availability. All methods are
applicable to material that is relatively uniform in strength and stiffness properties. Only Method C should be used to test material
suspected of having strength or stiffness variations within a panel caused by density variations, knots, knot-holes, areas of distorted
grain, fungal attack, or wide growth variations. However, Method B may be used to evaluate certain features such as core gaps
and veneer joints in plywood panels where effects are readily projected to full panels. Method C generally is preferred where size
of test material permits. Moments applied to fail specimens tested by Method A, B or D in which large deflections occur can be
considerably larger than nominal. An approximate correction can be made.
Sections
Method A—Center-Point Flexure Test 5
Method B—Two-Point Flexure Test 6
Method C—Pure Moment Test 7
Method D—Flexure Test for Quality Assurance 8
The choice of method will be dictated by the purpose of the test, type of material, and equipment availability. All methods are
applicable to material that is relative uniform in strength and stiffness properties. Only Method C should be used to test mate-
rial suspected of having strength or stiffness variations within a panel caused by density variations, knots, knot-holes, areas of
distorted grain, fungal attack, or wide growth variations. However, Method B may be used to evaluate certain features such as
core gaps and veneer joints in plywood panels where effects are readily projected to full panels. Method C generally is pre-
ferred where size of test material permits. Moments applied to fail specimens tested by Method A, B or D in which large de-
flections occur can be considerably larger than nominal. An approximate correction can be made.
1.2 Method A, Center-Point Flexure Test—This method is applicable to material that is uniform with respect to elastic and
strength properties. Total deflection, and modulus of elasticity computed from it, include a relatively constant component
attributable to shear deformation. It is well suited to investigations of many variables that influence properties uniformly
throughout the panel in controlled studies and to test small, defect-free control specimens cut from large panels containing defects
tested by the large-specimen method.
1.3 Method B, Two-Point Flexure Test—This method, like Method A, is suited to the investigation of factors that influence
strength and elastic properties uniformly throughout the panel, in controlled studies, and to testing small, defect free control
specimens cut from large specimens tested by Method C. However, it may be used to determine the effects of finger joints, veneer
joints and gaps, and other features which can be placed entirely between the load points and whose effects can be projected readily
to full panel width. Deflection and modulus of elasticity obtained from this method are related to flexural stress only and do not
contain a shear component. Significant errors in modulus of rupture can occur when nominal moment is used (see Appendix X1).
1
These methods are under the jurisdiction of ASTM Committee D07 on Wood and are the direct responsibility of Subcommittee D07.03 on Panel Products.
Current edition approved Nov. 1, 2011Nov. 15, 2017. Published November 2011December 2017. Originally approved in 1972. Last previous edition approved in 20002011
as D3043 – 00 (2006).(2011). DOI: 10.1520/D3043-00R11.10.1520/D3043-17.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohoc
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.