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AS/NZS 1328.1:2025
[Current]Glued laminated structural timber, Part 1: Performance requirements and minimum production requirements
AS/NZS 1328.1:2025 specifies requirements for glued laminated timber, including test methods for timber properties, the strength of finger, face and edge joints and the adhesives that provide satisfactory bonding of the component parts.
Published: 17/10/2025
Pages: 46
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
1 Scope and general
1.1 Scope
1.2 Normative references
1.3 Terms and definitions
1.4 Symbols and abbreviations
2 Manufacturing specification
3 Feedstock
3.1 Performance requirements
3.2 Initial assessment
3.3 On-going verification
4 Adhesives
4.1 Performance requirement
4.2 Initial assessment
4.3 On-going verification
5 Bond integrity
5.1 Performance requirement
5.2 Initial assessment
5.3 On-going verification
6 Finger joints in laminations
6.1 Performance requirement
6.2 Initial assessment
6.3 On-going verification
7 Structural properties of glued laminated timber
7.1 Performance requirement
7.2 Initial assessment
7.3 Ongoing verification
8 Appearance grade
8.1 Performance requirement
8.2 Grade A
8.3 Grade B
8.4 Grade C
9 Surface quality
9.1 Performance requirements
9.2 Sanded
9.3 Dressed
9.4 Sawn
9.5 Utility
9.6 Unprocessed
10 Dimensions
11 Formaldehyde emissions
11.1 Performance requirements
11.2 Initial assessment
11.3 Verification
12 Traceability
13 Product identification and labelling
Appendix A
A.1 Scope
A.2 Principle
A.3 Apparatus
A.4 Preparation of test specimens
A.5 Procedure
A.5.1 General
A.5.2 Test cycle — Method A
A.5.3 Test cycle — Method B
A.5.4 Measurement and evaluation of delamination
A.5.4.1 General
A.5.4.2 Measurement of delamination
A.5.4.3 Glue line openings considered to be delaminations
A.5.4.4 Glue line openings not considered to be delaminations
A.6 Results
A.6.1 General
A.6.2 Total delamination
A.6.3 Maximum delamination
A.6.4 Acceptance quality limits
A.6.5 Retest
A.6.6 Test report
Appendix B
B.1 Scope
B.2 Principle
B.3 Apparatus
B.4 Test specimens and test pieces
B.4.1 Test specimens
B.4.2 Test pieces
B.4.3 Glue line numbering
B.4.4 Test piece conditioning
B.5 Procedure
B.6 Results and acceptance criteria
B.6.1 Calculation of shear stress
B.6.2 Acceptance criteria
B.6.3 Retest
B.6.4 Test report
Appendix C
C.1 Scope
C.2 Principle
C.3 Apparatus
C.4 Preparation of test pieces
C.4.1 Sampling
C.4.2 Glue line detail
C.5 Procedure
C.5.1 General
C.5.2 Dry conditioning
C.5.3 Wet conditioning
C.5.4 Cleaving and evaluation of wood failure
C.6 Results and acceptance criteria
C.6.1 Calculation of wood failure
C.6.2 Acceptance criteria
C.6.3 Retest
C.6.4 Test report
Appendix D
D.1 Scope
D.2 General
D.3 Other factors affecting durability
Appendix E
E.1 Scope
E.2 Principle
E.3 Sampling
E.3.1 General
E.3.2 Initial assessment
E.3.3 On-going verification
E.4 Apparatus
E.5 Preparation of test pieces
E.6 Procedure
E.7 Calculations
E.7.1 General
E.7.2 Evaluation for initial assessment
E.7.3 Evaluation for on-going verification
E.8 Acceptance criteria
E.8.1 Initial assessment
E.8.2 On-going verification
E.9 Report
E.9.1 Report for initial assessment
E.9.2 Report for on-going verification
Appendix F
F.1 Scope
F.2 Test specimens
F.3 Apparatus
F.3.1 Determination of depth
F.3.2 Determination of length and width
F.3.3 Determination of straightness
F.4 Procedures
F.4.1 Determination of depth
F.4.2 Determination of length and width
F.4.3 Determination of straightness
F.4.4 Test report
Appendix G
G.1 General
G.2 Specimen selection
G.3 Testing
G.4 End product properties verification
G.4.1 Verification of E
G.4.2 Verification of bending strength
Bibliography
Cited references in this standard
[Current]
Timber - Methods of test for mechanical fasteners and connectors - Basic working loads and characteristic strengths
[Current]
Characterization of structural timber, Part 2: Determination of characteristic values
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