ASTM D5266-99(2005)
(Practice)Standard Practice for Estimating the Percentage of Wood Failure in Adhesive Bonded Joints
Standard Practice for Estimating the Percentage of Wood Failure in Adhesive Bonded Joints
SIGNIFICANCE AND USE
Wood failure is one of the principal means for determining the quality of an adhesively bonded wood joint.
When evaluated after a water soaking, water soaking and drying, or boiling and drying, the percentage of wood failure is an important criterion for qualifying adhesives for use in plywood and glued laminated structural timber for exterior use, and for daily quality control of the processes for manufacturing plywood and glued, laminated timbers. Standards that use the percentage of wood failure are included in Section 2.
In plywood manufactured from North American softwood species, the percentage of wood failure of Test Method D 906 specimens, tested wet after either a vacuum-pressure soak-dry or boil-dry treatment, correlates with the percentage of panels that delaminate in outdoor exposure without protection.8
Similar correlations for other products have not been published.
SCOPE
1.1 This practice provides procedures for estimating the percentage of wood failure that occurs in plywood-shear, block-shear, finger joint test specimens, or any other bondline involving wood.
1.2 The values stated in SI units are to be regarded as the standard. The values in parentheses are provided for information only.
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 and health practices and determine the applicability of regulatory limitations prior to use.
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Standards Content (Sample)
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Designation: D5266 − 99 (Reapproved2005)
Standard Practice for
Estimating the Percentage of Wood Failure in Adhesive
1
Bonded Joints
This standard is issued under the fixed designation D5266; 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 2.2 American National Standards:
ANSI/HPMA HP American National Standard for Hard-
1.1 This practice provides procedures for estimating the
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wood and Decorative Plywood
percentage of wood failure that occurs in plywood-shear,
ANSI/AITC A190.1American National Standard for Wood
block-shear, finger joint test specimens, or any other bondline
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Products—Structural Glued, Laminated Timber
involving wood.
2.3 Other Standards:
1.2 The values stated in SI units are to be regarded as the
American Plywood Association Proposed Standard Method
standard. The values in parentheses are provided for informa-
for Estimating Percentage Wood Failure on Plywood
tion only. 5
Shear Specimens
1.3 This standard does not purport to address all of the PS 1U.S. Product Standard for Construction and Industrial
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safety concerns, if any, associated with its use. It is the
Plywood
responsibility of the user of this standard to establish appro- Wood Handbook: Wood as an Engineering Material, Agri-
priate safety and health practices and determine the applica-
culturalHandbookNo.72,ForestService,ForestProducts
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bility of regulatory limitations prior to use. Laboratory (1987)
Inspection Bureau Memorandum No. 1Interpretation of
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2. Referenced Documents
Wood Failure
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2.4 ASTM Adjunct:
2.1 ASTM Standards:
PhotographsforVisuallyEstimatingthePercentageofWood
D905Test Method for Strength Properties of Adhesive
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Failure in Standard Adhesively Bonded Specimens
Bonds in Shear by Compression Loading
D906Test Method for Strength Properties of Adhesives in
3. Terminology
Plywood Type Construction in Shear by Tension Loading
3.1 Definitions:
D2559Specification for Adhesives for Bonded Structural
3.1.1 deep wood failure, n—failurethatisinvariablyseveral
Wood Products for Use Under Exterior Exposure Condi-
to many cells away from the adhesive layer, in which the
tions
fracture path is strongly influenced by the grain angle and
D4688Test Method for Evaluating StructuralAdhesives for
growth–ring structure.
Finger Jointing Lumber
D5572Specification forAdhesives Used for Finger Joints in 3.1.2 shallow wood failure, n—failure that is invariably
Nonstructural Lumber Products within the first one or two layers of cells beyond the adhesive
D5751SpecificationforAdhesivesUsedforLaminateJoints layer in which the fracture path is not influenced by the
in Nonstructural Lumber Products wood–grain angle or growth-ring structure (see 7.7 and 8.1).
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Available from Hardwood Plywood Manufacturers’Association, 1825 Michael
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This practice is under the jurisdiction ofASTM Committee D14 on Adhesives Faraday Drive, P.O. Box 2789, Reston, VA 22090-2789.
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and is the direct responsibility of Subcommittee D14.30 on Wood Adhesives. Available from American Institute for Timber Construction, 11818 S. E. Mill
Current edition approved April 1, 2005. Published May 2005. Originally Plain Blvd., Suite 415, Vancouver, WA 98684-5092.
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approved in 1992. Last previous edition approved in 1999 as D5266–99. DOI: Available fromAmerican PlywoodAssociation, P.O. Box 11700, Tacoma, WA
10.1520/D5266-99R05. 98411-0700.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or AvailablefromU.S.GovernmentPrintingOfficeSuperintendentofDocuments,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM 732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401.
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Standards volume information, refer to the standard’s Document Summary page on Available from ASTM International Headquarters. Request Adjunct No.
the ASTM website. ADJD5266.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D5266 − 99 (2005)
3.1.3 wood failure, n—the rupturing of wood fibers in
strength tests on bonded specimens, usually expressed as the
percentageofthetotalareainvolvedwhichshowssuchfailure.
4. Significance and Use
4.1 Wood failure is one of the principal means for deter-
mining the quality of an adhesively bonded wood joint.
4.2 When evaluated after a water soaking, water soaking
and drying, or boiling and drying, the percentage of wood
failureisanimportantcriterionforqualifyingadhesivesforuse
in plywood and glued laminated structural timber for exterior
use, and for daily quality control of the processes for manu-
fa
...
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