PS 2-10 is a performance-based standard which defines the end use application of a wood-based panel, such as plywood, OSB or composite panels. It defines the requirements for the use of wood-based panels as structural components which are recognised throughout North America.
The APA edition of the updated structural-standard with typical APA trademarks provides information on performance requirements, adhesive bond performance, panel construction and workmanship, dimensions and tolerances, marking, and moisture content of structural-use panels. Revised June 2011.
The standard establishes structural criteria for assessing the acceptability of plywood, OSB and composite panels for load bearing sheathing applications in construction such as floors, walls and roofs. It covers performance requirements, adhesive bond requirements, panel construction and workmanship, dimensions and tolerances, marking and moisture content. It also includes test methods to determine compliance.
The standard defines the terms associated with wood structural panel manufacturing to provide a common language across the industry. All the panels conforming to this standard must meet or exceed the following requirements:
General requirements: Dimensional tolerances and squareness of the panels, including their performance category and thickness tolerance. The veneer used must be in accordance with the veneer grades and workmanship given in PS 1-09 for plywood.
Performance requirements: Panels have to pass performance criteria covering three areas – structural performance, physical properties and adhesive bond performance.
Moisture content: Panels must have a moisture content of less than 16% at the time of shipment and at the time of testing.
Qualification Testing and Mill Specification: Providing test specimen requirements, conformance criteria, and mill specifications.
Qualification Testing: These tests cover structural, physical product properties and adhesive performance within the above ‘Performance Requirements’. Each has its own series of tests for:
Mill Specification: A propriety mill specification is written. once a panel type has passed the qualification testing process, This mill specification is unique to the particular panel type and for that specific mill and must be used for on-going quality assurance procedures. This specification covers:
Adhesive bond properties:
Test Methods: An outline of the exact test methodology to be followed to determine compliance with the standard. It gives the equipment, specimen preparation and procedure for each specific test as follows:
Trademarking and Certification: Panels conforming to PS 2-10 are obliged to carry the stamp of a qualified inspection and testing agency. This also includes the panel’s grade name in line with its end use application as well as the manufactured nominal thickness; its ‘Performance Category’; span rating; bond classification and the symbol PS 2-10.
For mat-formed panels with orientated strands, these must also carry marks indicating the panel’s strength axis.
APA is the voluntary product standard sponsor and organized the PS 2 Standing Committee that developed the revisions.