CSA O112.10:24

Preface This is the second edition of CSA O112.10, Evaluation of adhesives for structural wood products (limited moisture exposure). It supersedes the first edition published in 2008. The following are the major changes to this edition: a) addition of definitions to Clause 3; b) clarification of moisture content in Clause D.1.4.1; c) clarification of exposure in Clause D.2; and d) clarification of moisture content limits in Clause D.4.6.2. This Standard recognizes new levels of adhesive performance under additional service conditions to those covered in CSA O112.9. Structural bond lines in wood are usually evaluated for use under wet service. This Standard is targeted at adhesives for use in wood products restricted to dry service conditions. Unlike the other standards in the CSA O112 Series, which rely on CSA O112.0 for their test procedures, this Standard is not restricted to a specific class of adhesives and its test procedures are self-contained. It is also one of the few standards that evaluate the performance of adhesives under thermal conditions corresponding to those that would be encountered during a fire by a structural wood product used in a fire-protected wood assembly. Users of this Standard should note that it has been developed for untreated wood only. It is the responsibility of the users of this Standard to decide whether they wish to apply its requirements to treated wood as well. This Standard was prepared by the Subcommittee on Wood Adhesives, under the jurisdiction of the Technical Committee on Solid and Engineered Wood Products and the Strategic Steering Committee on Forest Products, and has been formally approved by the Technical Committee. This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group. Scope 1.1 Requirements for evaluating adhesives used in bonding This Standard specifies requirements for evaluating adhesives used to bond solid wood materials in structural wood products intended for limited moisture exposure applications. Note: See Annex D for additional information on limited exposure and other moisture exposure categories for structural wood adhesives. 1.2 Requirements for evaluating the resistance of adhesives This Standard specifies requirements for evaluating the resistance of adhesives to a) shear caused by compression loading, under both dry and re-dry conditions; b) delamination during accelerated exposure to wetting and drying; and c) deformation under static shear loading during exposure to heat or high humidity. 1.3 Assessment of chemical treatments This Standard is not intended for assessment of the effects of chemical treatments of wood on adhesive performance. 1.4 Terminology In in this Standard, "shall" is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; "should" is used to express a recommendation or that which is advised but not required; and "may" is used to express an option or that which is permissible within the limits of the standard. Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.