"Very stable." Harold said and Eugene proudly added,
"This stone wall would not only add stability, but also insulation." He said, "In addition, the wooden upper floors are light in case of earthquakes, in which case heavier upper floors may be much more dangerous than their alternatives."
As for how they connected the two floors, various techniques were used like supporting posts and beams, corbelling, wall tie-ins, and the like. There were even flexible joints that would allow the structure to accommodate movements, even if it was just due to change in temperature and humidity.
They shouldn't relax because the current climate was temperate, they didn't know what seasons there were in here.
Generally stone was stronger, but it wasn't ideal for earthquake-prone areas. Although The structural members were made with similar material to concrete, they didn't want to risk it. There was also the variable of stronger gravity.
