ASTM D7247-07ae1

This document is not anASTM standard and is intended only to provide the user of anASTM 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.
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Designation:D7247–07 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.
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e NOTE—Editorial corrections were made in 6.2 in April 2008.
1. Scope
1.1 This standard describes a test method for evaluating the comparative shear strength of a planar adhesive bond at both
ambient and elevated temperatures relative to the performance of solid wood under the same conditions. The test method is based
on the breaking load after the specimen is exposed to either ambient or a constant elevated temperature for a specified duration
as described in Section 7. This standard does not preclude the development and implementation of other methods that provide
equivalent performance meeting the intent of this method.
1.2 This test method is intended for the evaluation of adhesives that can be used to assemble test specimens in accordance with
Test Method D 905. The evaluation of other types of adhesives, such as the binder systems used for strand-based products, is
beyond the scope of this test method.
1.3 This test method is intended for the evaluation of adhesives as a component of laminated wood products at elevated
temperatures. The evaluation of fire performance on fire-rated laminated wood products or assemblies is beyond the scope of this
test method.
1.4 While it is preferable to use solid wood specimens as described in Section 6 as the control, structural composite lumber
products as defined in Specification D 5456 shall be permitted for use provided they are matched with the bonded specimens in
accordance with Section 6 and the ignition temperature is not significantly lower than solid wood of the same species.
1.5 The exact formulation of adhesive supplied to the manufacturer of laminated wood products shall be evaluated.
Modifications to the adhesive formulation require a separate evaluation unless approved by the manufacturer of the laminated
wood product, qualified agency, and code evaluation agency.
1.6 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.7 This standard does not purport to address all of the safety concerns, such as the fire hazard, 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.
2. Referenced Documents
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2.1 ASTM Standards:
D 905 Test Method for Strength Properties of Adhesive Bonds in Shear by Compression Loading
D 907 Terminology of Adhesives
D 2395 Test Methods for Specific Gravity of Wood and Wood-Based Materials
D 2915 Practice for Evaluating Allowable Properties for Grades of Structural Lumber
D 4933 Guide for Moisture Conditioning of Wood and Wood-Based Materials
D 5266 Practice for Estimating the Percentage of Wood Failure in Adhesive Bonded Joints
D 5456 Specification for Evaluation of Structural Composite Lumber Products
2.2 Other Documents:
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ANSI/AITC A190.1 American National Standard for Wood Products — Structural Glued Laminated Timber
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ANSI/AF&PA NDS-2005 National Design — Specification for Wood Construction (NDS)
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Wood Handbook Wood as an Engineering Material
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This test method is under the jurisdiction of ASTM Committee D14 on Adhesives and is the direct responsibility of Subcommittee D14.30 on Wood Adhesives.
Current edition approved June 1,July 15, 2007. Published July 2007. Originally approved in 2006. Last previous edition approved in 20062007 as D 7247 - 067.
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For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
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Available from American Institute of Timber Construction (AITC), 7012 S. Revere Parkway, Suite 140, Centennial, CO 80112, http://www.aitc-glulam.org.
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Available from U.S. Department of Agriculture, Forest Service, Forest Products Laboratory, One Gifford Pinchot Drive Madison, WI 53726.
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