What happens when an eleven storey wooden building catches fire?
AFAIK, Steel framed buildings are required to have insulation sprayed onto the steel to prevent softening & warping during a fire.
This insulation is often a mix of clay or Portland cement and wood fibers.
"Today’s engineered timber develops a protective charring layer that maintains structural integrity and burns very predictably – unlike steel, which warps under the intense heat."
I had a carpentry book that showed a building after a fire. A steel beam was melted and wrapped over a charred timber which was holding it up like it was wet noodle.