Ladders that provide no protection with reduced weight, they could possibly be a lighter alternative to corridors, maybe they even extend into the module below it. Also, it would look really interesting to see a crew member climb up to the crow's nest of an enemy ship.
That's perfectly moddable BTW. :D
Probably quite easy to do aswell. Just copy some of the stats for the ordinary corridor, and design the ladder.
I am thinking of a ladder deck, no armor, just 4 way section like corridors.
I know we can mod this, but it would be better to directly have it into the game!