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

https://www.tumblr.com/loftilynoisytwist/817115604090863616/dormers-that-do-not-deceive-the-100-year

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