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ASTM D2718-00e1

(Test Method)

Standard Test Methods for Structural Panels in Planar Shear (Rolling Shear)

Standard Test Methods for Structural Panels in Planar Shear (Rolling Shear)

SCOPE
1.1 These test methods determine the shear properties of structural panels associated with shear distortion of the planes parallel to the edge planes of the panels. Both shear strength and modulus of rigidity may be determined. Primarily, the tests measure the planar shear (rolling shear) strength developed in the plane of the panel.
1.2 Structural panels in use include plywood, waferboard, oriented strand board, and composites of veneer and of wood-based layers.
1.3 Two test methods are included:
1.3.1 Test Method A—Planar shear loaded by plates.
1.3.2 Test Method B—Planar shear induced by five-point bending.
1.3.3 The choice of method will be dictated by the purpose of the test and equipment available.
1.3.4 Test Method A, Planar Shear Loaded by Plates—This test method uses a rectangular panel section adhered between steel plates with protruding knife edges to create load at the panel faces. This test method has been used to develop shear properties of plywood and oriented strand board for the purpose of confirming design values. This test method does not produce pure shear, but the specimen length is prescribed so that the secondary stresses have a minimum effect. The method determines shear strength and modulus of rigidity.
1.3.5 Test Method B, Planar Shear Induced by Five Point Bending—Planar shear stress is induced on the panel while loaded in bending using two continuous spans. This test method determines planar shear strength consistent with panel applications under transverse loading. This test method is able to determine shear strength at any moisture condition.
1.4 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.

General Information

Status
Historical
Publication Date
09-Jun-2000
ICS
79.060.10 - Plywood
Technical Committee
D07 - Wood
Drafting Committee
D07.03 - Panel Products
Current Stage
Ref Project

Relations

Replaces
ASTM D2718-00 - Standard Test Methods for Structural Panels in Planar Shear (Rolling Shear)
Effective Date
10-Jun-2000
Replaced By
ASTM D2718-00(2006) - Standard Test Methods for Structural Panels in Planar Shear (Rolling Shear)
Effective Date
01-Oct-2006
Referred By
ASTM D7033-22 - Standard Practice for Establishing Design Capacities for Oriented Strand Board (OSB) Wood-Based Structural-Use Panels
Effective Date
10-Jun-2000
Referred By
ASTM D3044-16(2023) - Standard Test Method for Shear Modulus of Wood-Based Structural Panels
Effective Date
10-Jun-2000
Referred By
ASTM D5456-21e1 - Standard Specification for Evaluation of Structural Composite Lumber Products
Effective Date
10-Jun-2000
Referred By
ASTM D5457-23 - Standard Specification for Computing Reference Resistance of Wood-Based Materials and Structural Connections for Load and Resistance Factor Design
Effective Date
10-Jun-2000

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ASTM D2718-00e1 - Standard Test Methods for Structural Panels in Planar Shear (Rolling Shear)ASTM D2718-00e1 - Standard Test Methods for Structural Panels in Planar Shear (Rolling Shear)
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ASTM D2718-00e1 - Standard Test Methods for Structural Panels in Planar Shear (Rolling Shear)
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
e1
Designation: D 2718 – 00
Standard Test Methods for
1
Structural Panels in Planar Shear (Rolling Shear)
This standard is issued under the fixed designation D 2718; 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 (e) indicates an editorial change since the last revision or reapproval.
1
e NOTE—Note 1 was added editorially in March 2002.
1. Scope responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
1.1 These test methods determine the shear properties of
bility of regulatory limitations prior to use.
structural panels associated with shear distortion of the planes
parallel to the edge planes of the panels. Both shear strength
2. Referenced Documents
and modulus of rigidity may be determined. Primarily, the tests
2.1 ASTM Standards:
measure the planar shear (rolling shear) strength developed in
D 2395 Test Methods for Specific Gravity of Wood and
the plane of the panel.
2
Wood-Based Materials
1.2 Structural panels in use include plywood, waferboard,
D 4442 TestMethodsforDirectMoistureContentMeasure-
oriented strand board, and composites of veneer and of
2
ment of Wood and Wood-Base Materials
wood-based layers.
1.3 Two test methods are included:
3. Significance and Use
1.3.1 Test Method A—Planar shear loaded by plates.
3.1 Planar shear (rolling shear) characteristics of structural
1.3.2 Test Method B—Planar shear induced by five-point
panels determined by these test methods are essential for the
bending.
rigorous design of various glued wood-panel structural com-
1.3.3 The choice of method will be dictated by the purpose
ponents, such as box beams, folded plate roofs, and stressed
of the test and equipment available.
skin panels. Planar shear also may govern the design at low
1.3.4 Test Method A, Planar Shear Loaded by Plates—This
span-depth ratios encountered in floors subjected to high
test method uses a rectangular panel section adhered between
concentrated loads, concrete forms at high pouring pressures,
steel plates with protruding knife edges to create load at the
and bulk storage structures.
panel faces. This test method has been used to develop shear
3.2 The modulus of rigidity determined fromTest MethodA
properties of plywood and oriented strand board for the
is a composite of the entire specimen acting as a unit. For
purpose of confirming design values.This test method does not
plywood panels for which the ratio between the shear moduli
produce pure shear, but the specimen length is prescribed so
oftheplieswithgrainorientedparallelandperpendiculartothe
that the secondary stresses have a minimum effect.The method
shear forces is known, the rolling shear modulus of the
determines shear strength and modulus of rigidity.
perpendicular plies can be calculated.
1.3.5 Test Method B, Planar Shear Induced by Five-Point
3.3 Veneer produced by slicing or rotary peeling may
Bending—Planar shear stress is induced on the panel while
contain fine checks or separations parallel to the grain on the
loaded in bending using two continuous spans. This test
knife side of the veneer that are produced as the knife is forced
method determines planar shear strength consistent with panel
through the wood. These checks are termed “knife checks” to
applications under transverse loading. This test method is able
distinguish them from occasional checks that may be formed
to determine shear strength at any moisture condition.
on the opposite side of the veneer by forces at the compression
1.4 This standard does not purport to address all of the
bar, and from checks caused by drying. Knife checks can have
safety concerns, if any, associated with its use. It is the
a significant effect on rolling shear properties in plywood
panels and may be of significance in other veneer containing
1
This test method is under the jurisdiction of ASTM Committee D-7 on Wood panels.Test MethodArequires (when applicable) the testing of
and is the direct responsibility of Subcommittee D07.03 on Panel Products.
Current edition approved June 10, 2000. Published August 2000. Originally
2
published as D 2718 – 69 T. Last previous edition D 2718 – 95. Annual Book of ASTM Standards, Vol 04.10.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
D 2718
matching specimens having knife checks oriented both open the specimen due to growth or manufacturing features or from
and closed wherever possible (see Fig. 1). other causes shall be 6 in. (15 cm) wide by 18 in. (45 cm) long
3.4 To control or define other variables influencing rolling or
...

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1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
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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...

  • Standard
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  • Standard
    10 pages
    English language
    sale 15% off