That's fair, but I know of no aluminum I-beams used in modern highrise construction which is the context of my sentence.
Truss roofs are made from steel of various shapes, even I-beams, and wood. I'm only asking for clarification if all truss designs regardless of material are problematic in a fire.
Trusses on the other hand are quite dangerous in a fire.
https://community.fireengineering.com/forum/topic/show?comme...