ASTM International

Standard Specification for Adhesives for Bonded Structural Wood Products for Use Under Exterior Exposure Conditions
 N D2559 REV A

Annotation

This specification covers adhesives suitable for the bonding of wood, including treated wood, into structural wood products for general construction or other uses where a high-strength, durable adhesive bond is required.

This specification includes test methods that may be referenced by specific product standards for the evaluation and approval of structural wood adhesives. Methods are included to evaluate adhesives intended for use in exterior exposure.

NOTE 1—Consult the Commentary in Appendix X1 regarding the intent and limitations of each test method contained in this specification.

Description of Bondline Performance—It is recognized that structural wood adhesives are used in various applications and levels of severity in terms of moisture content, loading, cyclic and seasonal weather conditions, heat exposure and other use conditions. It is the intent of this standard to determine the suitability of an adhesive for use under various levels of severity and conditions with specific and appropriate test methods and requirements.

NOTE 2—This specification does not contain specific tests outlined for different chemical types of adhesives.

Strength and durability requirements of the adhesive are based on the performance of the adhesive in laminated wood as measured by:

Resistance to shear by compression loading after conditioning to the target moisture content indicated in 14.2.3 and meeting requirements in 14.4.

Resistance to delamination during exposure to three cycles of vacuum pressure wetting followed by drying at elevated temperature as indicated in 15.3 and meeting requirements in 15.4.