Fire efficiency isn't simply the core; bracket alloys, bolt grades, and coating systems all affect ratings

https://collinuddw416.yousher.com/100-years-of-patina-the-architect-s-case-for-hand-fabricated-copper-cupolas-by-salvo-metal-works-1

Fire performance isn't simply the core; brace alloys, bolt grades, and coating systems all affect ratings, so settings up are checked together for real-world conformity.