Unprotected engineered floors collapsed in about six minutes in Underwriters Laboratories testing. The numbers change what the 360 has to answer before anyone walks in over a basement fire.
What the DeKalb County film-studio fire teaches the first-due officer: get water before going deep, open doors only with fire control, stage an on-deck crew early, and pre-plan buildings that have changed use.
In lab houses and real buildings, a front door pulled back to the width of a hoseline slowed fire growth and kept a closed bedroom survivable. The findings translate into a few decisions for the first-due engine.
Crash-damaged electric vehicle batteries have reignited on the driveway, on the flatbed and days later in the impound yard. New full-scale research changes how much water to throw and what to tell the tow operator.