i am building a double wall, super insulated house (this is a custom
home. this is what the owner wants so don't waste your time telling
me it's a dumb idea). since it has double 2x4 walls, i see no reason
to add a third stud for a sheetrock nailer on the ouside corners. but
it seems i have read that 3 studs in the corner were required by the
irc. anyone know if this is true.

yeah, i'll ask my building inspector eventually. finding out this way
is funner, though.