Version Date: 2023-10-16
Delta Panels Pty Ltd
P: +61 07 3271 2170    E: info@deltapanels.com   W: www.deltapanels.com    A: 731 Boundary Road, Richlands, Qld 4077   ABN: 11 147 861 292
Whether you are building a stand-alone Carport or adding a Patio extension to your home, determining 
the correct wind rating is essential when considering the construction design and the materials that will 
be used.
There are 4 different factors that influence the wind classification, they are:-
-   Region
-   Terrain Category
-   Shielding Determination
-   Topographic Effect
Please remember that this is a guide only, check with your local authority to determine your exact rating. 
For a detailed analysis refer to the Australian Standard AS/NZS 1170:2:2021, the approach described 
here follows the AS 4055:2021 - Residential wind code method.
This approach is only suitable for structures up to 2 storeys high and no wider than 16m and 8.5m high.  
Outside these limitations, we recommend that you engage a structural engineer to provide advice on 
the approach suitable to your situation.
DETERMINING CORRECT WIND SPEED

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