Webwww.level.org.nz THE AUTHORITY ON SUSTAINABLE BUILDING Snow zones map © BRANZ 2012. Created Date: 8/10/2007 12:47:31 PM WebThe blue arrows show the wind as it is likely to be; the red arrows show how the wind would be if it flowed parallel to the isobars. The longer the arrow, the stronger the wind. Where the flow curves strongly around the High, the blue arrow is longer than the brown arrow, meaning the wind is stronger than the isobar spacing suggests.
How to build for New Zealand wind zones Altus Industrial
WebFeb 8, 2024 · In New Zealand, 'wind zone' is a way of calculating the design load of building materials needed for construction in a given location, so that said materials can withstand … The first step is to identify the wind region for the building from NZS 3604:2011 Figure 5.1. 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 … See more Determine if the site is in a lee zone. These are shown as hatched areas in Figure 5.1. Lee zones may have higher wind speeds. Back to top See more Determine the ground roughness from the two options defined by NZS 3604 paragraph 5.2.3: 1. Urban terrain – more than 10 obstructions … See more Determine the topographic class (T1–T4), from Table 5.2 and Figure 5.2 (see Figure 3). This consists of a number of steps (see Table 5.2): i. If not flat ground, determine if the ground is: 1. a hill – land rises to a crest or high point … See more Determine site exposure from the two options in paragraph 5.2.4: 1. Sheltered – a site surrounded by at least two rows of obstructions that are … See more prince knut
How to build for New Zealand wind zones Altus …
WebAug 6, 2024 · To start, input the Wind Velocity and Air Density. The calculator is set to a default wind density value for 15°C (66°F) and at level sea, which can provide a reasonable estimate if you don't know the actual wind density of your problem. However, you can change it to a custom one that adapts to your wind's characteristics. WebSep 23, 2015 · The wind zones in BRANZ Maps are an output from a successful 2014 research project at BRANZ. The project aimed to provide automated, calculated wind zones in accordance with NZS 3604:2011 Timber-framed buildings using GIS software, which can now be done for a specific site. WebMar 14, 2024 · The formula in determining the design wind pressure are: For design wind speed: V s i t, β = V R M d M z, c a t M s M t (1) Where: V s i t, β = design wind speed in m/s … please let me know what suits you best