Gah - a solution with more questions. – EntropicLqd
The ladder volume is a volume that allows vertical travel by a player pawn.
Chip: LadderVolumes don't function inside other PhysicsVolumes (save the DefaultPhysicsVolume, of course) unless you set the Priority property of the LadderVolume higher than that of the Physics Volume containing it (this per the UDN Volumes tute & pointed out to me by Doctor7, thankyouverymuch, mea culpa).
OMGTTFS Can you give a link to the UDN volumes tute. Much appreciated.
Balu: done. :-)
Mosquito: When using laddervolumes, give alittle slack at the top, so you can grab it from above