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.

1. 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.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

D905 Test Method for Strength Properties of Adhesive Bonds in Shear by Compression Loading

D906 Test Method for Strength Properties of Adhesives in Plywood Type Construction in Shear by Tension Loading

D2559 Specification for Adhesives for Bonded Structural Wood Products for Use Under Exterior Exposure Conditions

D4688 Test Method for Evaluating Structural Adhesives for Finger Jointing Lumber

D5572 Specification for Adhesives Used for Finger Joints in Nonstructural Lumber Products

D5751 Specification for Adhesives Used for Laminate Joints in Nonstructural Lumber Products

American National Standards

Other Standards

ASTM Adjunct

PhotographsforVisual

Keywords

adhesive; finger joints; parallel laminates; plywood; wood failure;

ICS Code

ICS Number Code 83.180 (Adhesives)

Citing ASTM Standards

[Back to Top]