Delta Panels Pty.Ltd.   ABN: 11 147 861 292          A: 731 Boundary Road, Richlands, Qld 4077
P: +61 7 3271 2170     E: info@deltapanels.com    W: www.deltapanels.com    
Version Date: 
08.05.2023
11
DETERMINING CORRECT WIND SPEED
Step 5       Wind Classification Chart
WIND CLASSIFICATION CONVERSION TABLE
WIND CLASSIFICATION
Serviceability 
Limit State 
Gust Wind Speed
metres per second
Ultimate Limit State
Gust Wind Speed
metres per second
Regions A and B
Regions C and D
N1 (Non-Cyclonic)
N/A
W26
W34
N2 (Non-Cyclonic)
N/A
W26
W40
N3 (Non-Cyclonic)
C1 (Cyclonic)
W32
W50
N4 (Non-Cyclonic)
C2 (Cyclonic)
W39
W61
N5 (Non-Cyclonic)
C3 (Cyclonic)
W47
W74
N6 (Non-Cyclonic)
C4 (Cyclonic)
W55
W86
Please Note: 
This is to be used as a guide only. Check with your local authority for your exact rating. For 
a complete analysis of estimating please refer to Australian Standard AS/NZS 1170.2:2021 
and AS 4055:2021
Delta Panels will not accept any liability for any loss or damage suffered as a result of any 
errors in the misinterpretation of any information provided in this guide. It is recommended 
to seek the services of an independent registered Engineer to confirm any calculations.

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