Direction of wind shown by smoke drift not by wind vanes.
Roofing wind speed map.
Irc table r301 2 1 basic wind speed criteria 90 mph.
Speed visual clues and damage effects.
Please note that a 1 90 or a 1a 90 rating does not provide the necessary wind speed requirements.
Leaves rustle and small twigs.
Irc r905 2 4 1 addresses wind resistance requirements for asphalt shingles.
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.
Simply put for the contiguous u s asce 7 05 has one wind speed map and it is based on allowable stress design.
Roof access or ladder must be provided for inspection.
Please contact us with feedback.
You only need to fill in either the city and state or the zip code.
This is a beta release of the new atc hazards by location website.
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.
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.
The jet stream map shows today s high wind speed levels and jetstream directions.
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.
Minimum wind speed in known high wind areas.
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.
Class f g and h are approved for wind speeds greater than 90 mph.
Little if any movement with flags.
4 to 7 mph.
A dfcm roof history record is required on all roofing systems contractors responsibility.
1 to 3 mph.
This type of roofing material is classified based on wind speed resistance and with wind ratings categorized as follows.
Wind felt on face.
Refer to local wind speed maps for other wind speed design requirements.
Gutters removed for re roofing and must be reinstalled for inspection.
Commercial reroof applications require plan submittal and plan review.
Provide approved roof covering product manufacturer s data listing with fire classification per ibc 1505 and assembly details.
