AS 4055:2021 Wind loads for housing.
This document specifies site wind speed classes for determining design wind speeds and wind loads for NCC Class 1 and lOa 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.
Wind loads for NCC Class 1 and lOa buildings that are not within the geometric limits given in Clause 1.2 and other NCC building classes, i.e. Class 2 to 9 buildings, are outside the scope of this document.
NOTE 1 Commentary on the clauses of this document is given in Appendix A.
NOTE 2 A worked example for the determination of topography is given in Appendix B.
NOTE 3 Worked examples for the determination of terrain category and shielding class are given in Appendix.
NOTE 4 A worked example for racking forces is given in Appendix D.
NOTE 5 Refer to AS/NZS 1170.2 for buildings that are outside the geometric and other limitations of
this document.
1.2 Geometric limits
For the purpose of this document, the following conditions (geometric limits) shall apply (see Figure 1.2):
The distance from averaged ground level to the underside of eaves shall not exceed 6.0 m.
The distance from averaged ground level to the highest point of the roof, not including chimneys, shall not exceed 8.5 m.
The width (W) including roofed verandas, excluding eaves up to a maximum of 0.9 m, shall not exceed 16.0 m. The length (L) shall not exceed five times the width.
The roof pitch shall not exceed 35°.
NOTE 1 The tables in Section 5 are based on a floor to ceiling height of 2.4 m and a floor depth of 0.3 m (floor level down to ceiling below).
Where wind loads on houses are determined using this document, design parameters shall be derived from this document only. Where wind loads on buildings are determined using AS/NZS 1170.2, design parameters in that Standard only shall be used.
NOTE 2 Clause 3.2.3 refers to pressures on solar panels given in AS/NZS 1170.2. These parameters are referenced in this document.AS 4055 pdf download.