scope:

Specifies the requirements for assessing and operating machine strength grading systems, to strength grade solid timber, and laminates for glulam. Whilst it is permitted to use this standard to determine machine settings and to grade to any possible strength profile for a given species, this standard refers to the strength classes of prEN 338 to provide suitable strength profiles and dictate the visual override requirements, necessary to make machine grading to this standard possible. In addition, guidance is given for the degree of quality control necessary to ensure the reliability of timber graded by strength grading machines. These requirements are given for both 'Machine Controlled' and 'Output Controlled' systems for grading timber.