Specifies requirements for the manufacture, grading, finishing and branding of structural plywood. It provides specifications for both stress and surface grades and specifies veneer qualities, bond quality, standard lay-up construction, dimensional tolerances, joints, moisture content and characteristic strength and stiffness values for the nominated stress grades. Five surface grades, based on the veneer quality of the face and back veneers, A, S, B, C and D and one bond quality, Type A bond, are prescribed.
Table of contents
Header
About this publication
Preface
1 Scope and general
1.1 Scope
1.2 Application
1.3 Referenced documents
1.4 Definitions
1.5 Grades of structural plywood
1.5.1 General
1.5.2 Surface grades
1.5.3 Stress grades
1.6 Dimensions and shape
1.6.1 Dimensions
1.6.2 Shape
1.7 Moisture content
1.8 Finish
1.9 Joints in sheets
1.10 Immunization and preservative treatment
1.10.1 Immunization of lyctid-susceptible sapwood
1.10.2 Preservative treatment
1.11 Formaldehyde emission classes
1.12 Branding
2 Veneer quality
2.1 General requirements for all veneers
2.2 Quality A veneer
2.2.1 General
2.2.2 Non-permitted imperfections
2.2.3 Permitted imperfections
2.3 Quality S veneer
2.4 Quality B veneer
2.4.1 General
2.4.2 Non-permitted imperfections
2.4.3 Permitted imperfections
2.5 Quality C veneer
2.5.1 General
2.5.2 Non-permitted imperfections
2.5.3 Permitted imperfections
2.6 Quality D veneer
2.6.1 General
2.6.2 Permitted imperfections
3 Manufacturing requirements
3.1 Joints in veneer
3.1.1 End joints
3.1.2 Edge joints
3.2 Structural joints in plywood sheets
3.3 Bonding between plies
3.4 Assembly of plywood
3.4.1 Construction
3.4.2 Standard constructions
3.4.3 Non-standard constructions
3.4.4 Lay‑up of plies
4 Application of stress grades and mechanical properties to structural plywood panels
