E: info@deltapanels.com      Head Office: 731 Boundary Road, Richlands, Qld 4077    +61 7 3271 2170
 W: www.deltapanels.com     Sydney Depot:  11 The Old Northern Road, Narellan, NSW 2567   +61 2 4611 7712
ABN: 11 147 861 292
Version Date: 
2025-11-25
10
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.
Step 1.1 - Region       Select the Region
STEP 1         DETERMINING CORRECT WIND SPEED

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