Fire efficiency isn't just the core; bracket alloys, bolt qualities, and finish systems all impact scores

https://www.scribd.com/document/1058179918/Copper-Does-Not-Lie-Why-Architects-Select-Salvo-Metal-Works-for-Customized-Smokeshaft-Shrouds-that-Last-a-Century-206280

Fire efficiency isn't simply the core; bracket alloys, screw grades, and finish systems all influence ratings, so assemblies are tested together for real-world compliance.