AS/NZS 2878:2000

Specifies a procedure for the classification of timber species into positive or provisional strength groups based on testing of small, clear specimens or on the species mean dry density. When used in conjunction with visual grading rules the strength groups provide a means of determining a stress grade for graded timber. A list of species and their strength groups is given.

This Standard establishes a procedure for the classification of timber species into strength groups based either on the values obtained from testing small clear specimens or on the species mean density at 12 percent moisture content. It specifies the unseasoned and seasoned strength groups of most of the timber species used in Australia.NOTE: This Standard does not deal with the role that these strength groups play in the determination of stress grades, basic working stresses and characteristic properties, nor does it cover alternative means of determining stress grades of timber.This Standard describes procedures for single species and does not cover species groups except where strength groups are given in Tables 3.1 and 3.2.

First published as MP 45-1979.Revised and redesignated as AS 2878-1986.Jointly revised and designated AS/NZS 2878:2000.Reconfirmed 2017. Originated as MP 45-1979. Previous edition AS 2878-1986. Jointly revised and designated AS/NZS 2878:2000.