Roofing Wind Zone Map

These zones are defined as follows.

Roofing wind zone map.

The north zone design live load equates to 40 pounds per square foot the middle zone equates to 30 pounds per square foot and the south zone equates to 20 pounds per square foot. Our wind load factors map is a resource for engineers designing structures for wind loads in seattle. Special inspections and tests. The wind speed maps roof zones enclosure classifications and external pressure coefficients.

Simply put for the contiguous u s asce 7 05 has one wind speed map and it is based on allowable stress design. Zone 2 consists of the county of worcester. Counties marked as map not available need to make changes to their wind maps. There are some noteworthy differences between the three asce 7 editions and they include.

The locations of wind load zones are shown in the figures 1611 1a 1611 1b 1611 1c maps. Wind zone i equates to a 70 mph fastest mile wind speed. Higher loading than zone 1. Per asce 7 10 buildings are composed of 5 different zones depending on the wind loading they are subjected to.

Has the lowest load. Windspeedbyzip is a tool for architects engineers and builders to easily determine the 3 second gust basic windspeed figure 6 1 of asce 7 05 and now design wind speed per asce 7 10 maps for any location in the continental united states to determine the basic windspeed fill in the address below. The north zone middle zone and the south zone are identified on the roof load zone map above. Therefore maps are provided of rainfall seismic snow and wind criteria in different regions.

Wind zone i wind zone ii and wind zone iii are identified on the basic wind zone map above. Those counties are calhoun dixie flagler nassau. And zone 3 consists of the counties of essex middlesex suffolk norfolk plymouth. Wind zone ii equates to a 100 mph fastest mile wind speed.

780 cmr 1611 0 wind load 1611 1 wind load zones. In order for a structure to be sound and secure the foundation roof and walls must be strong and wind resistant. This zone accounts for approximately 80 of the roof surface represented in the interior zones of the roof. Zone 1 consists of the counties of berkshire franklin hampshire and hampden.

You only need to fill in either the city and state or the zip code. A current wind map was not provided by the county please contact the local government building department for wind speed information. The manufactured home producer designs the home to resist the wind load which is measured in pounds per square foot. When building a structure it is important to calculate wind load to ensure that the structure can withstand high winds especially if the building is located in an area known for inclement weather.

This chapter expands on. This downward imposed load on the home is also known as the snow load.