Roofing Wind Speed Map

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Roofing wind speed map.

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. Irc r905 2 4 1 addresses wind resistance requirements for asphalt shingles. 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.

Class f g and h are approved for wind speeds greater than 90 mph. This is a beta release of the new atc hazards by location website. Speed visual clues and damage effects. Irc table r301 2 1 basic wind speed criteria 90 mph.

Gutters removed for re roofing and must be reinstalled for inspection. Refer to local wind speed maps for other wind speed design requirements. Little if any movement with flags. Direction of wind shown by smoke drift not by wind vanes.

All asphalt shingles including 3 tab shingles bearing the packaging label astm d 3161 class d are approved for 90 mph wind speeds. Smoke rises vertically with little if any drift. 1 to 3 mph. Leaves rustle and small twigs.

Minimum wind speed in known high wind areas. 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. Commercial reroof applications require plan submittal and plan review. Please note that a 1 90 or a 1a 90 rating does not provide the necessary wind speed requirements.

Wind felt on face. Simply put for the contiguous u s asce 7 05 has one wind speed map and it is based on allowable stress design. 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. Roof access or ladder must be provided for inspection.

A dfcm roof history record is required on all roofing systems contractors responsibility. Please contact us with feedback. Provide approved roof covering product manufacturer s data listing with fire classification per ibc 1505 and assembly details. The jet stream map shows today s high wind speed levels and jetstream directions.

4 to 7 mph.