CSA O121:26

N/A
Preface This is the ninth edition of CSA O121, Douglas fir plywood . It supersedes the previous editions published in 2017, 2008, 1978, 1973, 1961, 1957, 1954, and 1953. This Standard specifies an in-plant production and quality control system that includes auditing by a recognized certification body if applicable. It also provides a mechanism for the specification, quality control, and certification of custom grades and allows the use of alternative overlay systems. The following are the major changes to this edition: a) update of some publication references; and b) change to moisture content under Clause 9.1. This Standard was prepared by the Technical Committee on Wood-Based Panels, under the jurisdiction of 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 General This Standard applies to exterior bond, all-veneer plywood with a minimum of three plies and parallel grain direction of the face and back plies. 1.2 Requirements This Standard specifies requirements for a) a quality system; b) ply species; c) materials; d) panel construction; e) bonding; f) veneer and panel grades; g) dimensions and tolerances; h) marking; and i) testing. 1.3 Terminology 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. 1.4 Units of measurement The values given in SI units are the units of record for the purposes of this Standard. The values given in parentheses are for information and comparison only.