We are now working on a large asnaro tub with a 260mm wide border!
Commonly, large top frame borders like in your case are done laminaing 2
planks, anyway we had a beautiful piece of asnaro in the warehouse, so the frame will be done in one piece!
It was probably ment to be a cut for a beam or daikoku-bashira (main column) but at present there are not many chances to use expensive wood even for temples or shrines…
The lumber was 360×360 straight cut! This means that the 1/3 central segment of the tree was almost half meter square at the base. The tree had probably a diameter of 1200 to 1500mm !!
We could get our kamachi in one piece and also most of the planks for the sides from the same piece. This means the tub is going to be all straight cut!
Please do not ask us to provide such lumber for your project. This stroke of luck does not happen more than once a year…