To be more clear, the stone is, in fact mortared, but the stores are not in any conventional bond pattern; just stones fit together as their sizes dictate.
I have the task of deisgning the underpinning of a stone foundation wall under a 2-story urban rowhouse. Test pitting reveals that the stone wall is on a loose stone foundation just below the existing basement floor. The owner wants to dig out another 12" for headroom in the basement.
I have...
