If there is a ladder on the other side of a wall you can teleport through the wall to the bottom of the ladder, met common place i have found it possible to do this is in the hospital stairwell (the one with 2 searchable floors at elektro docks guessing its the same for this style of hospital swell), The fire station (second tier of steps). This is also possible In other building but i don't know the name when i come across them in game i will take a picture of the building.