Fire performance isn't just the core; bracket alloys, bolt grades, and coating systems all affect scores

https://reidjgcr153.image-perth.org/dormers-that-do-not-trick-the-100-year-performance-of-customized-copper-by-salvo-metal-works

Fire performance isn't just the core; brace alloys, screw grades, and coating systems all affect ratings, so assemblies are tested together for real-world compliance.