AS 3519-1993

1 - AS 3519-1993 TIMBER-MACHINE PROOF-GRADING
4 - PREFACE
4 - CONTENTS
5 - FOREWORD
6 - 1 SCOPE
6 - 2 APPLICATION
6 - 3 REFERENCED DOCUMENTS
6 - 4 DEFINITIONS
6 - 4.1 Basic working stress in bending
6 - 4.2 Double-pass grading
6 - 4.3 F-grade
6 - 4.4 Edge-biased grading
6 - 4.5 Proof grading
6 - 4.6 Grading operator
6 - 4.7 Grade run
6 - 4.8 Machine proof- grader
6 - 4.9 PG material
7 - 4.10 Parent population
7 - 4.11 Pre-sort
7 - 4.12 Proof stress
7 - 4.13 Proof-grade
7 - 4.14 Proof load
7 - 4.15 Proof load factor
7 - 4.16 Random-edge grading
7 - 4.17 Single-pass grading
7 - 4.18 Shear span
7 - 4.19 Stress grade
7 - 4.20 Stress grading
7 - 4.21 Sub-population
7 - 5 NOTATIONThe
8 - 6 PROOF-GRADING SYSTEM
8 - 7 MACHINE PROOF-GRADER
8 - 7.1 Loading configuration
8 - 7.2 Load control
8 - 7.3 Deflection sensor
8 - 7.4 Identification of tension edge
8 - 7.5 Calibration
10 - 8 PROOF-GRADING
10 - 8.1 Grading procedures
10 - 8.2 Grading requirements
10 - 8.2.1 Individual pieces of timber
11 - 8.2.2 Visual grading rules
11 - 8.2.3 Grading operator
11 - 8.2.4 Verification
11 - 9 MARKING
12 - 10 CALCULATION OF PROOF LOAD
13 - APPENDIX A - PROOF-GRADING OPERATION FLOW CHART
14 - APPENDIX B - PRE-SORTING OF TIMBER
14 - B1 GENERAL
14 - B2 PROCEDURE DOCUMENTATION
15 - APPENDIX C - ESTIMATE OF PROOF STRESS
15 - C1 GENERAL
15 - C2 STRUCTURAL GRADES
15 - C3 PROOF LOAD REDUCTION
22 - APPENDIX D - STRUCTURAL EQUATIONS
22 - D1 CALCULATION OF THE NOMINAL BENDING STRESS AND DEFLECTION

This Standard sets out the requirements and procedures necessary for machine proof-grading of timber. The proof-grading system and machine proof-grader are specified and the relationship of visual grading and verification of properties using AS 4063 to machine proof-grading are given. Methods and tables allowing estimates of the required proof-stress are included.

This Standard sets out procedures for obtaining stress-graded timber by machine proof-grading.

First published as AS 3519-1993.