Fire performance isn't simply the core; bracket alloys, screw grades, and surface systems all influence scores

https://www.scribd.com/document/1041618560/Leader-Boxes-Developed-to-Last-The-Architect-s-Copper-Criterion-223754

Fire efficiency isn't simply the core; brace alloys, bolt grades, and surface systems all impact scores, so assemblies are tested with each other for real-world conformity.