Roofing Wind Speed Map

Irc table r301 2 1 basic wind speed criteria 90 mph.

Roofing wind speed map.

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. Gutters removed for re roofing and must be reinstalled for inspection. This type of roofing material is classified based on wind speed resistance and with wind ratings categorized as follows. Minimum wind speed in known high wind areas.

Speed visual clues and damage effects. Class f g and h are approved for wind speeds greater than 90 mph. The jet stream map shows today s high wind speed levels and jetstream directions. Leaves rustle and small twigs.

This is a beta release of the new atc hazards by location website. Please note that a 1 90 or a 1a 90 rating does not provide the necessary wind speed requirements. Refer to local wind speed maps for other wind speed design requirements. Please contact us with feedback.

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. All asphalt shingles including 3 tab shingles bearing the packaging label astm d 3161 class d are approved for 90 mph wind speeds. Commercial reroof applications require plan submittal and plan review. Simply put for the contiguous u s asce 7 05 has one wind speed map and it is based on allowable stress design.

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. Irc r905 2 4 1 addresses wind resistance requirements for asphalt shingles. Wind felt on face. Smoke rises vertically with little if any drift.

The current wind map shows the current wind speed and direction for the most recent hour. Low wind areas and 110 m p h. Little if any movement with flags. Wind barely moves tree leaves.

A dfcm roof history record is required on all roofing systems contractors responsibility. 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. 1 to 3 mph. Provide approved roof covering product manufacturer s data listing with fire classification per ibc 1505 and assembly details.

Direction of wind shown by smoke drift not by wind vanes.