Wind Zone Map Roof

The north zone middle zone and the south zone are identified on the roof load zone map above.

Wind zone map roof.

Wind zone i equates to a 70 mph fastest mile wind speed. Wind zone ii equates to a 100 mph fastest mile wind speed. There are some noteworthy differences between the three asce 7 editions and they include. Chapter 17 provides a variety of procedures and criteria for testing materials and assemblies labeling materials and assemblies and special inspection of structural assemblies.

Zone 2 consists of the county of worcester. And zone 3 consists of the counties of essex middlesex suffolk norfolk plymouth. Zone 1 consists of the counties of berkshire franklin hampshire and hampden. Special inspections and tests.

Simply put for the contiguous u s asce 7 05 has one wind speed map and it is based on allowable stress design. 780 cmr 1611 0 wind load 1611 1 wind load zones. The zones relate to the severity of exposure to wind driven salt with b being low risk c medium risk and d high risk. Zone 3 homes should be able to resist winds of up to 110 mph.

Things get a bit more complicated for wind zones 2 and 3. In 3280 305 c 1 ii b there is a comprehensive table listing all the requirements. The manufactured home producer designs the home to resist the wind load which is measured in pounds per square foot. Building for a wind zone.

The corrosion zones in branz maps are our interpretation of the exposure zones in nzs 3604 2011. The wind speed maps roof zones enclosure classifications and external pressure coefficients. Anchorage in the 130 mph 58 m s wind zone shall be continuous from the roof to the foundation. If you re thinking about buying a prefab home keep in mind that a home built to wind zone 1 cannot be placed by the manufacturer in zones 2 or 3 but a home built to wind zone 3 standards can be placed in lower wind zones.

This chapter expands on. Three exposure zones zone b zone c and zone d are shown on a map of the north and south islands in figure 4 2 of nzs 3604 2011. Roof assemblies in the 130 140 and 150 mph 58 m s 63 m s and 67 m s wind zones as established in table r301 2 1 shall have rafter or truss ties provided in accordance with either table r4508 2 or the prescriptive requirements of section r4508. Therefore maps are provided of rainfall seismic snow and wind criteria in different regions.

Manufactured housing institute basic wind zone map. The locations of wind load zones are shown in the figures 1611 1a 1611 1b 1611 1c maps. Homes built for wind zone 2 should be able to withstand winds up to 100 mph.