Fire efficiency isn't just the core; brace alloys, screw grades, and coating systems all influence ratings

https://rafaelkxmb415.almoheet-travel.com/why-the-most-difficult-designers-specify-copper-custom-made-components-that-prove-themselves-over-100-years

Fire performance isn't simply the core; brace alloys, bolt qualities, and surface systems all influence rankings, so assemblies are checked together for real-world compliance.