Roofing Wind Speed Map

This is a beta release of the new atc hazards by location website.

Roofing wind speed map.

Class f g and h are approved for wind speeds greater than 90 mph. Smoke rises vertically with little if any drift. 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. Gutters removed for re roofing and must be reinstalled for inspection.

Speed visual clues and damage effects. Refer to local wind speed maps for other wind speed design requirements. Please contact us with feedback. This type of roofing material is classified based on wind speed resistance and with wind ratings categorized as follows.

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. A dfcm roof history record is required on all roofing systems contractors responsibility. The current wind map shows the current wind speed and direction for the most recent hour. 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. Commercial reroof applications require plan submittal and plan review. Leaves rustle and small twigs. 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.

1 to 3 mph. Please note that a 1 90 or a 1a 90 rating does not provide the necessary wind speed requirements. Roof access or ladder must be provided for inspection. 4 to 7 mph.

Irc table r301 2 1 basic wind speed criteria 90 mph. Wind barely moves tree leaves. Simply put for the contiguous u s asce 7 05 has one wind speed map and it is based on allowable stress design. Minimum wind speed in known high wind areas.

Low wind areas and 110 m p h. Direction of wind shown by smoke drift not by wind vanes. Wind felt on face. The jet stream map shows today s high wind speed levels and jetstream directions.

Little if any movement with flags.