I don't know what techniques timber framers and carpenters favour for hand work only, but I guess they wouldn't use OBMs as the upper limit for straight forward OBM chisel would seem to be about 3/4', perhaps 1" in softer wood. I assume a lot of drilling out, or varieties of adze, twybil etc?
OBMs above 5/8" seem to be rare. Too big to handle I suppose.
OTOH OBMs down to 1/8" seem to be common, which is a mystery to me - who needs a 1/8" slot? I guess for metal work, straps and hinges etc. but I can't say I've ever noticed a 1/8" slot in old woodwork. Obviously looking in the wrong places!
PS
Twybil (mortising axe) [TWYBIL] : Ashley Iles Tool Store
I guess two handed, long handle, for big mortices