WALTHAM, Mass. — SPRI has announced that its updated and revised standard, ANSI/SPRI WD-1 2012 “Wind Design Standard Practice for Roofing Assemblies” has been reapproved by ANSI.
SPRI’s revised document complies with the current American Society of Civil Engineers (ASCE) document ASCE 7-10 “Minimum Design Loads for Buildings and Other Structures,” which was significantly revised in 2010. These revisions affect every roofing professional who uses ASCE for determining wind loads on structures. Some of the revisions include new wind speed maps using a 700+ year return, reinstating Exposure Category D for hurricane-prone coastlines, as well as “simplified” procedures for determining wind pressures for buildings of all heights.