Roofing Wind Speed Map

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.

Roofing wind speed map.

4 to 7 mph. Asce 7 10 has three wind maps based on risk category i risk category ii and risk categories iii and iv and they are based on strength design. Smoke rises vertically with little if any drift. Irc table r301 2 1 basic wind speed criteria 90 mph.

Gutters removed for re roofing and must be reinstalled for inspection. Class f g and h are approved for wind speeds greater than 90 mph. Speed visual clues and damage effects. Direction of wind shown by smoke drift not by wind vanes.

Leaves rustle and small twigs. Provide approved roof covering product manufacturer s data listing with fire classification per ibc 1505 and assembly details. Irc r905 2 4 1 addresses wind resistance requirements for asphalt shingles. The current wind map shows the current wind speed and direction for the most recent hour.

Please contact us with feedback. 1 to 3 mph. Roof access or ladder must be provided for inspection. 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.

Please note that a 1 90 or a 1a 90 rating does not provide the necessary wind speed requirements. You only need to fill in either the city and state or the zip code. Commercial reroof applications require plan submittal and plan review. Wind barely moves tree leaves.

All asphalt shingles including 3 tab shingles bearing the packaging label astm d 3161 class d are approved for 90 mph wind speeds. Little if any movement with flags. Simply put for the contiguous u s asce 7 05 has one wind speed map and it is based on allowable stress design. A dfcm roof history record is required on all roofing systems contractors responsibility.

Minimum wind speed in known high wind areas. Low wind areas and 110 m p h. Wind felt on face. The jet stream map shows today s high wind speed levels and jetstream directions.

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