United States

3.6.7 BIRD-SAFE BUILDING DESIGN

All BA51 (new construction) or BA55 (major repairs and alterations) projects affecting the glazing of the
envelope, meet the following (historic buildings must make a determination with the RHPO):

• The Act states:
  
  
  • All glass, from ground level to a minimum of 40 feet above grade must have a Threat Factor
    rating of 30 or less
    
    
  • All glass, 15 feet above a green roof must have a Threat Factor rating of 30 or less
    
    
  • All glazed corners or fly-through conditions must have a Threat Factor less than or equal to 25
    
    

See The American Bird Conservancy Threat Factors product database. All projects should consider bird friendly design per the American Bird Conservancy for Bird-Safe Building Design and the National Glass Association's Best Practices for Bird-Friendly Glazing Design.