REVISION OF AUSTRALIAN MGP STRESS GRADES 2009

摘要

This paper presents the process undertaken to revise a suite of stress grades used for machine-graded softwoods in Australia. The legal framework in which timber is currently produced has highlighted that manufacturers need to have confidence that all published properties are met by the populations of stress-graded products. The paper outlines the development of properties for MoE, bending strength, tension strength, compression strength and shear strength. Two properties, usually bending strength and MoE, are tested in quality control programs, and compliance of all other properties is inferred from these tests. The study investigated the relationships between the tested properties and the inferred properties.