Tuff Span panels have FM and UL Classifications for fire protection. FM Global Standard 4880: Tuff Span cladding panels have FM Class 1 rating for unlimited heights and without automatic sprinkler requirements. UL/ULC Flame Spread Rating: Class 1 flame spread and smoke development per ASTM E 84. ULC S134: Tuff Span FM panels have been tested and certified for this testing. Other fire protection testing and certifications for Tuff Span panels include ASTM E108, ASTM D-635, and others.