Roofing Wind Uplift Ratings

The cost of a roof system is affected by the wind design but how are wind uplift ratings determined.

Roofing wind uplift ratings.

Understanding wind uplift ratings for roofing. Damentals of wind uplift on low slope roofs. The use of wind pressure tables included in the monograph which allow the selection of wind pressure values without detailed calculations and converting them to fm global wind uplift ratings is explained. Duration series shingles are unrivaled by any other architectural shingles because they feature our patented surenail technology a technological breakthrough in shingle design.

Sometimes a roofing designer will assume that a design wind speed requirement of 90 mph then the roof system rating will be 1 90. Because fm approvals requires a 2 1 safety factor roofs with field of roof uplift forces of 30 pounds per square foot are the maximum for 1 60 ratings and 37 5 pounds per square foot are the maximum for 1 75 ratings etc. These ratings actually apply to wind uplift pressure in pounds per square foot and are not directly related to wind speeds. With extreme wind events on the rise now is the time to.

In this scenario our building. The series highlights our popular duration shingles along with up to 7 other duration styles depending on where you live that feature unique performance characteristics. Mark gallant jun 22 2020. Wind speeds of 60 90 or 120 miles per hour.

Roofs with field of roof uplift forces of 30 pounds per square foot are the maximum for 1 60 ratings and 37 5 pounds per square foot are the maximum for 1 75 ratings etc. The 2020 atlantic hurricane season is off to the fastest start in recorded history and warmer ocean temperatures are expected to generate hurricanes and tropical storms with much more frequency and intensity. A balance should be achieved so that the cost to prevent blow off isn t unnecessarily high while the wind resistance capacity is sufficient for a roof to stay intact according to the appropriate wind related classification. Therefore a system listed as a 60 system can be utilized for projects where the roof field pressures are calculated to be 30 psf or less.

You only need to fill in either the city and state or the zip code. The paper examines the use of ultimate strength design safety provisions in wind uplift design. How are wind uplift ratings determined. 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.