Roofing Wind Zone Map

780 cmr 1611 0 wind load 1611 1 wind load zones.

Roofing wind zone map. Our map shows wind exposure and terrain adjustment factors based on the wind load provisions in the american society of civil engineers asce s minimum design loads of buildings and other structures asce 7. Special inspections and tests. You only need to fill in either the city and state or the zip code. There are some noteworthy differences between the three asce 7 editions and they include.

Wind zone i equates to a 70 mph fastest mile wind speed. Zone 2 consists of the county of worcester. 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. 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. Wind maps by county all wind maps are in pdf format. The north zone middle zone and the south zone are identified on the roof load zone map above. This chapter expands on.

Zone 1 consists of the counties of berkshire franklin hampshire and hampden. This downward imposed load on the home is also known as the snow load. These zones are defined as follows. 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. Counties marked as map not available need to make changes to their wind maps. 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.

Per asce 7 10 buildings are composed of 5 different zones depending on the wind loading they are subjected to. Has the lowest load. Higher loading than zone 1. The locations of wind load zones are shown in the figures 1611 1a 1611 1b 1611 1c maps.

A current wind map was not provided by the county please contact the local government building department for wind speed information. Wind zone i wind zone ii and wind zone iii are identified on the basic wind zone map above. Chapter 17 provides a variety of procedures and criteria for testing materials and assemblies labeling materials and assemblies and special inspection of structural assemblies. 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. Therefore maps are provided of rainfall seismic snow and wind criteria in different regions.