Fire performance isn't just the core; bracket alloys, screw qualities, and coating systems all impact ratings

https://blogfreely.net/frazigkbpn/h1-b-leader-boxes-constructed-for-generations-hand-fabricated-copper-that

Fire performance isn't simply the core; brace alloys, bolt qualities, and coating systems all impact ratings, so settings up are checked with each other for real-world conformity.