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AS/NZS 1720.4:2019
[Current]Timber structures, Part 4: Fire resistance of timber elements
The objective of this Standard is to provide a method for determining the fire resistance for structural adequacy and insulation of sawn timber, timber in pole form, plywood, laminated veneer lumber (LVL), and glued-laminated structural timber elements as an alternative to the test method specified in AS 1530.4.
Published: 20/12/2019
Pages: 14
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 Materials
1.4.1 Timber materials
1.4.2 Structural adhesive
1.4.3 Non-structural adhesives
1.4.4 Non-fire-retardant treated timber
2 Design method
2.1 General
2.2 Structural adequacy
2.3 Integrity
2.4 Insulation
2.5 Calculation of notional charring rate
2.5.1 Notional charring rate
2.5.2 Calculation of notional charring rate
2.5.3 Notional charring rate determined by test
2.6 Calculation of effective depth of charring
2.6.1 Charring of fire-exposed surfaces
2.6.2 Charring behind fire-resistant protective insulation
2.7 Determining the effective residual section
2.8 Barrier junctions
3 Assessment of joints with metal connectors
3.1 Unprotected connectors
3.2 Protected metal connectors
3.2.1 General
3.2.2 Embedding
3.2.3 Fire-resistant protective insulation covering
3.2.4 Fire resistance testing
Appendix A
A.1 Scope
A.2 Procedure
A.3 Specimen
A.4 Results
A.5 Test report
Appendix B
B.1 General
B.2 Standard fire exposure
B.3 Non-standard fire exposure/design fires
Bibliography
Cited references in this standard