What are the wind zones in NZ?

Wind zone classifications (from NZS 3604 Timber framed buildings)

Classification Maximum ultimate limit state speed
Medium 37 m/s
High 44 m/s
Very high 50 m/s
Extra high 55 m/s

What does wind zone 1 mean?

For Zone 1, the home must be able to withstand wind speed up to 70-mph. According to the Wind Zone Map above, Zone 1 covers the largest area of the U.S. Zone 2. As the zone numbers go up, so do the wind speeds. In Zone 2, homes are built to resist wind speeds up to 100 mph.

How do you determine wind zone?

Wind zones are determined by the amount of wind pressure in an area. The higher the possible wind pressure in an area, the higher rate of the wind zone. So, if you live in an area that is a designated Wind Zone III, then you live in an area with the highest wind speeds.

What is wind region A?

Wind Region A = Ultimate Design Wind Speed ~ 146km/h. Wind Region C = Ultimate Design Wind Speed ~ 232km/h – Cyclonic. Wind Region D = Ultimate Design Wind Speed ~ 317km/h – Cyclonic.

What zone is NZ?

Based on the USDA Hardiness Zone Map, this interactive version covers the country of New Zealand which ranges from Zone 5a to Zone 12a….List of Hardiness Zones for Locations in New Zealand.

Location Hardiness Zone
Christchurch Zone 9a: -6.7°C to -3.9°C
Dunedin Zone 10b: 1.7°C to 4.4°C

What are the 5 major wind zones?

The Earth contains five major wind zones: polar easterlies, westerlies, horse latitudes, trade winds, and the doldrums.

What are normal wind levels?

Beaufort Wind Scale

0 — Calm less than 1 mph (0 m/s)
1 — Light air 1 – 3 mph 0.5-1.5 m/s
2 — Light breeze 4 – 7 mph 2-3 m/s
3 — Gentle breeze 8 – 12 mph 3.5-5 m/s
4 — Moderate breeze 13 – 18 mph 5.5-8 m/s

What is normal wind per hour?

In the U.S., daily wind speeds typically average between 6 and 12 miles per hour (10 and 19 kilometers per hour) throughout the course of a year.

What wind rating is Darwin?

Latest Weather at 2:00pm, Sunday 2 Jan 2022.

WNW Wind Direction
17 km/h 9 knots Wind Speed
22 km/h 12 knots Wind Gust

What is N5 wind rating?

Wind Classifications

Wind Class Notation Serviceable Wind Speed (m/s)
N4 W50 39
N5 W60 47
N6 W70 55
C1 W41C 32

Which zone is the coolest zone?

The coldest zone of the Earth is known as the Frigid Zone. It receives very less heat because the rays of the Sun are very slanted here. The North Frigid Zone lies between the Arctic Circle and the North Pole, while the South Frigid Zone lies between the Antarctic Circle and the South Pole.

How do I determine the wind zone for a specific location?

A means of determining the wind zone for a specific location is in NZS 3604:2011 Table 5.1 (see Table 1). This describes a six-step process. STEP 1– WIND REGION The first step is to identify the wind region for the building from NZS 3604:2011 Figure 5.1.

What are windwind zones in Wellington City?

Wind Zones for the Wellington City Urban Areas using NZS3604:2011. When applying for a building consent, the wind zone in which a structure is located determines structural requirements (New Zealand Building Code – NZBC B1 – Structure) and weather tight requirements (NZBC E2 – External Moisture).

How many wind regions does New Zealand have?

This map divides the country into two wind regions – A and W – based on wind speed data from the New Zealand MetService. The regions are too general, however, as land formations can modify and create significant localised variations to wind speeds.

What is the wind zone for wind bracing?

Where the zone is not high (H), the multiplier for the relevant wind zone is used to calculate the correct wind bracing demand. Where wind zone is above extra high (from Table 5.4), the wind zone is SED or specific engineering design and is beyond the scope of NZS 3604. Table 1: Procedure for determination of wind zones.