New idea: Stone Cade !!!

[Honey Badger]

but Iron is heavier then Stone though if i'm mistaken, and Stones does sound reasonable since they only used Iron in weapons and armours and in some cases as reinforcements on doors and gates. probably Reason why you don't have Iron Castles.

I meant something like a iron version of the normal barricade.  A stone cade would be very big and would not be very portable. where as a iron cade could consist of 8 iron bars being put together. I did not mean a massive wall of iron  :