Roofing Wind Uplift Ratings

Understanding wind uplift ratings for roofing.

Roofing wind uplift ratings.

With extreme wind events on the rise now is the time to. 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. Duration series shingles are unrivaled by any other architectural shingles because they feature our patented surenail technology a technological breakthrough in shingle design.

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. How are wind uplift ratings determined. The cost of a roof system is affected by the wind design but how are wind uplift ratings determined. In this scenario our building.

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. Asce 7 uplift ratings and warranties description. Sometimes a roofing designer will assume that a design wind speed requirement of 90 mph then the roof system rating will be 1 90. 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.

Mark gallant jun 22 2020. 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. 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. In the industry there is a need to sort out the confusion between building codes uplift rated assemblies and warranties by explaining what each offers and how they should be considered.

The numeric designation 60 75 90 etc is the calculated wind uplift pressures with a 2 1 margin of safety applied. 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. These ratings actually apply to wind uplift pressure in pounds per square foot and are not directly related to wind speeds.