Last Updated 4/12/2024
  ASCE 7-22 FORTIFIED™ Wind Uplift Design Pressure Calculator
for Residential Roof Coverings (2:12 or Greater)1,2,3
      Mean Roof Height (ft) =
         
      Roof Type =
         
      Roof Slope =
     
       Design Wind Speed, Vult (mph) =
         
      Exposure = 
         
                   
        Wind Uplift Design Pressures (psf):           
        Refer to FORTIFIED Standard Detail F-G-2
below for locations of Zones 1, 2, & 3
       
       
  Notes:                
  1.  Wind uplift design pressures provided are Component and Cladding (C&C) ASD pressures acting away from the roof surface per FBC 2023 Table R301.2(2).  Minimum pressures for FORTIFIED correspond to Vult = 130 mph with Exposure C.
  2. This design aid is intended to be preliminary guidance for section R905.1 of 2024 IRC for use with the FORTIFIED Home™ Program. Design pressures must meet or exceed local code requirements. This aid does not supplant the need for drawings or plans to be reviewed and signed by a professional engineer.
 
 
  3.  Understanding design pressures is critical to selecting and installing roofing materials to comply with the IRC and the FORTIFIED Home™ program. Refer to FORTIFIED Technical Bulletin FH 2020-01 for additional guidance.