Being in the building industry I am Following closely on how the fire spread so fast, building flaws eg the garbage chutes can channel smoke upstairs.
That policy is so bad, even in small fires everyone should go outside to the fire assembly point, we use British building code in Kenya and it has some flaws eg.
-open staircases in ideal situations you should open a door to the access to the staircase.
-garbage chutes should automatically close when fire alarm goes off.
-Have dry and wet risers, swimming pool acts as a fire fighting tank.
-for 10 floors and above, have a fire proofed floor in the middle for those unable to use the staircase all the way down.
-switch of central air conditioning
-pioed gas and electric power switched off
To Each His Own