NEN EN 519 : 1995

Foreword
Introduction
1. Scope
2. Normative references
3. Definitions
4. Symbols
5. Requirements for machine strength graded timber
6. Requirements for the company producing graded timber,
     on the operation of strength-grading machines
7. Requirements for the acceptance of strength-grading
     machines
7.1 Requirements for all systems
7.2 Additional requirements for machine-controlled
     systems
7.3 Additional requirements for output-controlled systems
8. Requirements for the derivation of machine settings
8.1 Requirements for machine-controlled sytems
8.2 Requirements for output-controlled systems
9. Requirements for production testing in output-controlled
     systems
9.1 General
9.2 Sampling from production
9.3 Procedure for testing samples from production
9.4 Cusum control constants
9.5 Use of cusum control charts and resulting action
Annexes
A. (informative) Additional requirements for the
     certification body on the operational control of
     grading machines
B. (informative) Example of cusum control charts
C. (normative) Measurement of visually-assessed
     characteristics

Specifies the requirements for assessing and operating machine strength grading systems, to strength grade structural timber and laminates for glulam.