Fire efficiency isn't just the core; brace alloys, screw qualities, and coating systems all affect ratings

https://record-wiki.win/index.php/Designers_on_Copper:_Why_Custom_Smokeshaft_Shrouds_Are_Specified_for_100-Year_Roofs

Fire performance isn't simply the core; brace alloys, bolt grades, and surface systems all impact scores, so assemblies are tested together for real-world compliance.