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 02 4611 7712
ABN: 11 147 861 292
Version Date: 
08.05.2023
14
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
26
34
N2 (Non-Cyclonic)
N/A
26
40
N3 (Non-Cyclonic)
C1 (Cyclonic)
32
50
N4 (Non-Cyclonic)
C2 (Cyclonic)
39
61
N5 (Non-Cyclonic)
C3 (Cyclonic)
47
74
N6 (Non-Cyclonic)
C4 (Cyclonic)
55
86
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.
STEP 1        DETERMINING CORRECT WIND SPEED
Step 1.5       Wind Classification Chart

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