Roofing Wind Speed Map

The jet stream map shows today s high wind speed levels and jetstream directions.

Roofing wind speed map.

4 to 7 mph. Irc table r301 2 1 basic wind speed criteria 90 mph. Wind barely moves tree leaves. A dfcm roof history record is required on all roofing systems contractors responsibility.

Provide approved roof covering product manufacturer s data listing with fire classification per ibc 1505 and assembly details. Leaves rustle and small twigs. This is a beta release of the new atc hazards by location website. Class a for winds up to 60 mph class d 90 mph class f 110 mph class g 120 mph and class h 150 mph.

Please contact us with feedback. Class f g and h are approved for wind speeds greater than 90 mph. 1 to 3 mph. Smoke rises vertically with little if any drift.

Minimum wind speed in known high wind areas. Gutters removed for re roofing and must be reinstalled for inspection. Speed visual clues and damage effects. Commercial reroof applications require plan submittal and plan review.

Little if any movement with flags. Please note that a 1 90 or a 1a 90 rating does not provide the necessary wind speed requirements. The current wind map shows the current wind speed and direction for the most recent hour. Roof access or ladder must be provided for inspection.

Of buildings with mean roof height 60 feet new wind load criteria for attached canopies new guidance in the commentary for designing for tornadoes new risk category iv wind speed map 7th edition 2020 fbcb asce 7 16 figure 26 5 1d while the wind speed maps in asce 7 16 have been revised significantly for the nonhurricane. This type of roofing material is classified based on wind speed resistance and with wind ratings categorized as follows. Low wind areas and 110 m p h. 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.

You only need to fill in either the city and state or the zip code. All asphalt shingles including 3 tab shingles bearing the packaging label astm d 3161 class d are approved for 90 mph wind speeds. Simply put for the contiguous u s asce 7 05 has one wind speed map and it is based on allowable stress design. Irc r905 2 4 1 addresses wind resistance requirements for asphalt shingles.

Refer to local wind speed maps for other wind speed design requirements.