O452.0-94 (R2001)

1. Scope 1.1 This Standard pertains to OSB panels intended for use in engineered design applications and covers three types of Design Rated OSB panels: Type 1 (STANDARD), Type 2 (PLUS), and Type 3 (PROPRIETARY). 1.2 This Standard includes requirement for binders used in OSB manufacture. 1.3 This Standard specifies the method for evaluating short term basic structural capacities of OSB Products as produced by a specific mill. 1.4 This Standard specifies requirements for sampling, testing, and data analysis for initial qualification, for establishing Control Values, and for independent third party certification. 1.5 This Standard establishes a classification system for the basic structural capacities of Types 1 and 2 Design Rated OSB consisting of three rating grades for each of seven nominal thicknesses, and gives rules for assigning design ratings to qualified Products based on qualification tests. 1.6 This Standard provides for the assignment of engineering design values (specified design capacities) to Type 3 Design Rated OSB Products. 1.7 This Standard prescribes panel markings for identification of STANDARD, PLUS, and PROPRIETARY Products. 1.8 This Standard does not establish specified design capacities or allowable unit stresses for Design Rated OSB. Note: For specified design capacities or allowable unit stresses for Design Rated OSB, see CSA Standard O86.1 or manufacturers' literature. 1.9 This Standard does not specify the constituent materials or processes used in the manufacture of the Product, or the finish quality of panels. Neither does it cover all requirements of OSB panels in every design application. Note: Appendix A identifies additional properties that may be required for specific applications. 1.10 The values given in SI (metric) units are the standard. The values in parentheses are for information only.