These oversized stairs have pipes for foam and water pre installed and can use prestored cabin levels for faster operation. They are safer to use than slides and don't interfere with the firefight. These are regular fire brigade vehicles with comms and everything onboard and they are operated by trained firemen in some coordinated way.
That's not your old rusty pickup with aftermarked stairs mounted on top.
http://www.rosenbauer.com/en/de/rose...ape-stair.html