Pick your standard
Wind reports follow different rule books depending on what you're designing. Pick the one that fits your project — we'll do the rest.
AS 4055 — Houses
Pick this for single- or two-storey homes up to 8.5 m tall. You get one overall wind class (e.g. N2, C2) — that's the single number truss, bracing, and tie-down designers use directly. Simpler in, simpler out.
AS/NZS 1170 — Everything else
Pick this for anything that isn't a house: sheds, factories, masts, silos, walls, free-roofs, carports, towers — any structure, any height. You get the site wind speed plus per-direction multipliers your engineer plugs into pressure calculations.
Not sure? Use AS/NZS 1170 — it covers everything AS 4055 does and more.
Design parameters
Importance Level
How important is this building if the wind ever wins? Level 2 covers most ordinary buildings — homes, offices, sheds, retail. Bump it up if a failure would hurt more people or cost more (Level 3 for schools and shopping centres, Level 4 for hospitals and emergency services). Use Level 1 only for minor farm sheds and the like. Higher level = stronger design wind.
Design working life
How long will the building be standing? 50 years is the default and what most projects use. Pick 100 years for buildings meant to last (institutional, monumental), 25 years for short-term permanent structures, or Temporary (under 6 months) for scaffolding and site sheds. Longer life = stronger design wind.
How tall is the building?
Wind speeds up the higher you go. A house at 3 m gets a much gentler push than a building at 30 m, so we need the height to figure out the right design load.
Enter the building's average height. For a flat-roofed building, that's just the roof height. For a pitched-roof building, take it as halfway up the slope (i.e. the average of the eaves height and the ridge height).
For non-buildings (masts, monopoles, towers, silos), use the overall structure height — top of the structure above ground.
Range: 1 – 200 m
Where's the site?
Wind speed varies a lot across the country — coastal NT and FNQ get cyclones, Melbourne and Adelaide get gentler winds. Pin the exact site so we look up the right regional wind speed and the right terrain category.
Three ways to set the location: type an address into the search, paste in latitude/longitude, or just click anywhere on the map to drop a pin.
Tip: if you've got Google Maps or a survey plan with exact coords, paste them in — the address search rounds to the nearest building, which can be a few metres off.
Ready to generate
We'll run a full wind analysis on the site you picked and email you a PDF report once payment goes through. The report has everything an engineer or builder needs to start their pressure calculations — regional wind speed, terrain category, topography effects, and the relevant multipliers per direction.
The report is also available to download from the next page (and anytime after that via the link in the email).
One-time purchase — $25
No subscription, no recurring fees. Pay once per report. Payment is handled by Stripe; we don't see your card details.
Check the summary on the right matches what you intended. You can use the Back button to adjust anything before paying.