AS 4055-2006

1 - AS 4055-2006 WIND LOADS FOR HOUSING
4 - PREFACE
5 - CONTENTS
6 - SECTION 1 SCOPE AND GENERAL
6 - 1.1 SCOPE
6 - 1.2 LIMITATIONS
6 - 1.3 NORMATIVE REFERENCES
7 - 1.4 DEFINITIONS
7 - 1.4.1 Average slope
7 - 1.4.2 Bottom of hill, ridge or escarpment
7 - 1.4.3 Height
8 - 1.4.4 House
8 - 1.4.5 Length
8 - 1.4.6 Plan
8 - 1.4.7 Racking forces
8 - 1.4.8 Width
8 - 1.5 NOTATION
10 - SECTION 2 WIND LOADS
10 - 2.1 CLASSIFICATION
10 - 2.2 RELATIONSHIP TO WIND REGION AND SITE CONDITIONS
13 - 2.3 SELECTION OF TERRAIN CATEGORY
13 - 2.4 SELECTION OF TOPOGRAPHIC CLASS
15 - 2.5 SELECTION OF SHIELDING CLASS
17 - SECTION 3 CALCULATION OF PRESSURES AND FORCES
17 - 3.1 PRESSURE COEFFICIENTS
17 - 3.1.1 Wind classes N1 to N6 (non-cyclonic)
17 - 3.1.2 Wind classes C1 to C4 (cyclonic)
18 - 3.2 CALCULATION OF PRESSURES
18 - 3.3 CALCULATION OF FORCES
19 - 3.4 PRESSURES FOR TYPICAL APPLICATIONS
21 - SECTION 4 UPLIFT FORCES
22 - SECTION 5 RACKING FORCES
22 - 5.1 RACKING FORCES
22 - 5.2 AREA OF ELEVATION
39 - APPENDIX A - COMMENTARY
39 - A1 COMMENT ON TABLE 2.1-WIND CLASSIFICATION
39 - A2 DERIVATION OF TABLE 2.2-WIND CLASSIFICATION
40 - A3 COMMENT ON CLAUSE 1.3-GEOMETRIC LIMITS
41 - A4 COMMENTARY ON PRESSURE COEFFICIENTS (Section 3)
41 - A5 COMMENTARY ON PRESSURES FOR DETERMINATION OF RACKING FORCES (SECTION 5)
41 - A5.1 General, notation and assumptions
44 - A5.2 Equivalent pressures on projected areas
47 - A6 CONVERTING WIND SPEEDS
48 - APPENDIX B - WORKED EXAMPLE FOR THE DETERMINATION OF TOPOGRAPHY
50 - APPENDIX C - WORKED EXAMPLES FOR THE SELECTION OF TERRAIN CATEGORY AND SHIELDING CLASS
52 - APPENDIX D - WORKED EXAMPLE FOR RACKING FORCES

Specifies site wind speed classifications for determining design wind speeds and wind loads for housing that is within specified geometric limits. Wind speeds are specified for the serviceability and ultimate strength/stability limit states.

This Standard specifies site wind speed classes for determining design wind speeds and wind loads for housing within the geometric limits given in Clause1.2. The classes are for use in the design of housing and for design, manufacturing and specifying of building products and systems used for housing.Wind loads for houses not complying with the geometric limits given in Clause 1.2 are outside the scope of this Standard.NOTES:1 Commentary on the clauses of this Standard is given in AppendixA.2 A worked example for the determination of topography is given in AppendixB.3 Worked examples for the determination of terrain category and shielding class are given in AppendixC.4 A worked example for racking forces is given in AppendixD.5 Where houses do not comply with the geometric and other limitations of this Standard, use AS/NZS1170.0 and AS/NZS1170.2.

First published as AS 4055-1992.
Second edition 2006.