ASTM D7247-07a

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Designation:D7247–07a
Standard Test Method for
Evaluating the Shear Strength of Adhesive Bonds in
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Laminated Wood Products at Elevated Temperatures
This standard is issued under the fixed designation D 7247; 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. Scope 1.6 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information
1.1 This standard describes a test method for evaluating the
only.
comparative shear strength of a planar adhesive bond at both
1.7 This standard does not purport to address all of the
ambient and elevated temperatures relative to the performance
safety concerns, such as the fire hazard, associated with its use.
of solid wood under the same conditions. The test method is
It is the responsibility of the user of this standard to establish
based on the breaking load after the specimen is exposed to
appropriate safety and health practices and determine the
either ambient or a constant elevated temperature for a speci-
applicability of regulatory limitations prior to use.
fied duration as described in Section 7. This standard does not
preclude the development and implementation of other meth-
2. Referenced Documents
ods that provide equivalent performance meeting the intent of
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2.1 ASTM Standards:
this method.
D 905 Test Method for Strength Properties of Adhesive
1.2 This test method is intended for the evaluation of
Bonds in Shear by Compression Loading
adhesives that can be used to assemble test specimens in
D 907 Terminology of Adhesives
accordance with Test Method D 905. The evaluation of other
D 2395 Test Methods for Specific Gravity of Wood and
types of adhesives, such as the binder systems used for
Wood-Based Materials
strand-based products, is beyond the scope of this test method.
D 2915 Practice for Evaluating Allowable Properties for
1.3 This test method is intended for the evaluation of
Grades of Structural Lumber
adhesives as a component of laminated wood products at
D 4933 Guide for Moisture Conditioning of Wood and
elevated temperatures. The evaluation of fire performance on
Wood-Based Materials
fire-rated laminated wood products or assemblies is beyond the
D 5266 Practice for Estimating the Percentage of Wood
scope of this test method.
Failure in Adhesive Bonded Joints
1.4 While it is preferable to use solid wood specimens as
D 5456 Specification for Evaluation of Structural Compos-
described in Section 6 as the control, structural composite
ite Lumber Products
lumber products as defined in Specification D 5456 shall be
2.2 Other Documents:
permitted for use provided they are matched with the bonded
ANSI/AITCA190.1 American National Standard for Wood
specimens in accordance with Section 6 and the ignition
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Products — Structural Glued Laminated Timber
temperature is not significantly lower than solid wood of the
ANSI/AF&PANDS-2005 National Design — Specification
same species.
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for Wood Construction (NDS)
1.5 The exact formulation of adhesive supplied to the
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Wood Handbook Wood as an Engineering Material
manufacturer of laminated wood products shall be evaluated.
Modifications to the adhesive formulation require a separate
3. Terminology
evaluation unless approved by the manufacturer of the lami-
3.1 Definitions:
nated wood product, qualified agency, and code evaluation
agency.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
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This test method is under the jurisdiction of ASTM Committee D14 on the ASTM website.
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Adhesives and is the direct responsibility of Subcommittee D14.30 on Wood Available from American Institute of Timber Construction (AITC), 7012 S.
Adhesives. Revere Parkway, Suite 140, Centennial, CO 80112, http://www.aitc-glulam.org.
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Current edition approved July 15, 2007. Published July 2007. Originally AvailablefromU.S.DepartmentofAgriculture,ForestService,ForestProducts
approved in 2006. Last previous edition approved in 2007 as D 7247 - 07. Laboratory, One Gifford Pinchot Drive Madison, WI 53726.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D7247–07a
3.1.1 Many terms in this test method are defined in Termi- wide face (vertical grain), and be free of defects and at the
nology D 907. equilibrium moisture content recommended by the manufac-
turer of the adhesive. If no such recommendation exists, the
...