I'll have to record audio a bit later but so far I found you can bind crouch to a scroll wheel and clip through a lot of floors using it.

I managed to get the Arc Doc even on a fresh save this way.

You can also clip under the floor to warp to your vehicle basically anywhere in the world, I don't quite know what makes a surface prime for clipping, at the start of the game I can clip on a sharp slope.

I also found a lot of poles, walls or slight debris will help you clip.