This is the third edition of CSA O151, Canadian softwood plywood. It supersedes the previous editions published in 1978 and 1974.
This Standard specifies an in-plant production and quality control system that includes auditing and control by a recognized certification body. It also provides a mechanism for the specification, quality control, and certification of custom grades and allows the use of alternative overlay systems.
This Standard applies to exterior bond, all-veneer plywood that has a minimum of three plies and in which the grain direction of the face and back plies is the same.
This Standard specifies requirements for
(a) assessment and attestation of conformity;
(b) minimum quality of veneers;
(c) classification of veneer species;
(d) adhesives and glue bond quality;
(e) panel construction;
(f) panel type and grade;
(g) tolerances for dimensions; and
In CSA Standards, 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; may is used to express an option or that which is permissible within the limits of the standard; and can is used to express possibility or capability.
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.