SPRI, the association representing sheet membrane and component suppliers to the commercial roofing industry, has announced that the revised Wind Design Standard Practice for Roofing Assemblies has been re-affirmed as an American National Standard.
Wind Design Standard Practice for Roofing Assemblies provides a methodology of designing for wind uplift resistance of non-ballasted built-up, modified bitumen, and single-ply roofing system assemblies installed over any type of roof deck. The revision updates the standard to incorporate the design pressure calculation changes contained in the American Society of Civil Engineers (ASCE) document, ASCE 7-16 Minimum Design Loads for Buildings and Other Structures.
SPRI developed Wind Design Standard Practice for Roofing Assemblies as a reference for the design, specification, and installation of non-ballasted single-ply roofing systems. It was last revised and reaffirmed in 2014. The new standard is available for download free of charge on SPRI’s website.