24:Floor_RaiseToHighest(tag, speed, change, crush)
Raises tagged floors to their highest adjacent neighbours. Speed is number of map unit eighths per tic, and for classic Doom floors it should be 8. Change sets whether to change floor texture and sector type upon raising the floor (see Floor_LowerByValue for details). Crush is optional damage inflicted on blocking things.
Similar to the Boom 'fixed' behaviour, such floors, if crushing, will stop movement while dealing damage.
Note that under vanilla Hexen this special acts unexpectedly: it raises the floor to the lowest neighbour ceiling. But in any other game modes this special will act as advertised.