New Wall Terrain Spotted

This afternoon we are looking at what looks like a new piece of terrain in the 6th edition rulebook. While i am not 100% on it, I don't remember seeing these before. When it comes to new models, even though I have been around this hobby for a long time, I still am not the best at finding new things hidden on pages.


Please by all means comment and let us know if you have seen these before, and if not, what do you think we are looking at, a future release?

via Eric
I have attached page 93 of the new rule book.  The arrows I have posted there point to wall sections I have never seen before, and I've been around since Rogue Trader days.  Think it might be a sneak peak of new Cities of Death buildings?