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1 Site Location
2 Design Criteria
3 Terrain & Topography
4 Building Envelope — Surface Pressures (optional)
All coefficients verified against AS/NZS 1170.2:2021 (Tables 5.1–5.4, 5.6). General-area values use Kl = 1.0; local cladding zones are tabulated separately.
Advanced: direction multipliers Md (Table 3.2)
By default the calculator applies the standard's per-region directional values from Tables 3.2(A) and 3.2(B) (cyclonic regions B2, C, D: 0.90 for structure, 1.0 for cladding).
Results
Site wind speeds per AS/NZS 1170.2:2021 Eq. 2.2. Pressures are p = 0.5·ρair·Vdes,θ²·Cshp·Cdyn with your entered Cshp×Cdyn. This tool assists preliminary assessment only and is not a substitute for design by a qualified structural engineer.