J Tabordiy : Interesting use of materials, Actually historically significant in that a certain type of landowner in the say 1300s would build his 1st floor out of Stone,
this would be a grain and tools area, and likely the kitchen area, with a wattle and daub exterior chimney to be pulled down in case of a chimney or Kitchen fire
The living quarters were constructed above usually with a timber frame core !
I think your ridge line needs a weight carrier, but you may be fine over such a short distance -
which begs the question what is your location !
Bill Bradbury wrote:It looks like the floor joists are hanging by the tenons. Not true, right?
Glenn Herbert wrote:I would be cautious aout the cross beam at the end of the overhang, though, as that would have nothing but the horizontal tenon to support it. I would suggest a different joint there, more like half-lapped, so the stresses on the ends of the overhanging beams and the ends of the cross beams are equal.