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AS 4055:2021
[Current]Wind loads for housing
AS 4055 specifies site wind speed classes for determining design wind speeds and wind loads for NCC Class 1 and 10 buildings within the geometric limits given in Clause 1.2. The classes are for use in the design of housing and for design, manufacturing and specifying of building products and systems used for housing. Keywords: Housing; Wind loads; Wind speeds; Housing design
Published: 25/06/2021
Pages: 67
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
1 Scope and general
1.1 Scope
1.2 Geometric limits
1.3 Normative references
1.4 Terms and definitions
1.5 Notation
2 Wind loads
2.101 General
2.1 Site wind classification
2.2 Relationship to wind region and site conditions
2.3 Selection of terrain category
2.4 Selection of topographic class
2.5 Selection of shielding class
2.6 Wall and roof wind classifications
2.6.1 General
2.6.2 Use of wind classifications
3 Calculation of pressures and forces
3.1 Pressure zones
3.2 Pressure coefficients
3.2.1 Roof and wall wind classifications N1 to N6 (non-cyclonic)
3.2.2 Roof and wall wind classifications C1 to C4 (cyclonic)
3.2.3 Wind pressures on photovoltaic solar panels
3.3 Calculation of pressures
3.4 Calculation of forces
3.5 Pressures for typical applications
4 Uplift forces
5 Racking forces
5.1 General
5.2 Area of elevation
Appendix A
A.1 General
A.2 Section 1
A.2.1 Clause 1.1 — Scope
A.2.2 Clause 1.2 — Geometric limits
A.2.3 Clause 1.2 — Use of AS/NZS 1170.2
A.3 Section 2
A.3.1 Tables 2.1(A) and 2.1(B) — Design gust wind speed
A.3.2 Table 2.2 — Site wind classification
A.3.3 Terrain category
A.3.4 Topographic class
A.3.5 Shielding
A.3.6 Wall and roof wind classifications
A.4 Sections 3 and 4 — Calculation of pressures and forces
A.4.1 General
A.4.2 Advice for loads on roof-mounted solar panels
A.5 Section 5 — Pressures for determination of racking forces
A.5.1 General
A.5.2 Notation
A.5.3 Assumptions
A.5.4 Equivalent pressures on projected areas
A.5.4.1 For flat wall surfaces, gable or skillion roof ends
A.5.4.2 For side elevations, single or upper storey, gable- or hip-ended roofs
A.5.4.3 Side elevation, lower storey of two storeys or subfloor, gable- or hip-ended roof
A.5.4.4 End elevation, single or upper storey, hip-ended roof
A.5.4.5 End elevation, lower storey of two storeys, hip-ended roof
A.6 Converting wind speeds
Appendix B
B.1 General
B.2 Houses on an escarpment
B.3 Houses on a hill
Appendix C
C.1 General
C.2 Example A
C.3 Example B
C.4 Example C
C.5 Example D
Appendix D
Amendment control sheet
AS 4055:2021
Amendment No. 1 (2024)
Revised text amendment
Cited references in this standard
Content history
[Current]
[Superseded]
[Available Superseded]
DR AS 4055:2021
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