Is there a rule (scantling) for replacing plywood with strip-plank?
That is, if plywood of X millimeters is specified for a hull, then
what should the thickness of the strip planks be?

I do have a vague idea of doubling; in other words, using 12mm strips
instead of 6mm plywood, say. But I can't think of where I got this from,
and, indeed, it seems to add a lot of weight.


Thank you,
Sakari Aaltonen