It's for a hard chine, flat panel catamaran. I won't use endangered imported
wood. I think we have plenty in this country and we manage to make it
sustainable, which is actually cool.

Weight is important, so is durability. DF is plenty strong. I can use core
cell but I don't really want to have to glass the interior. I will though if
I don't find an alternative.

Plans call for 9 mm Okume w/ 9 oz glass outside.

9mm MDO w/glass? or 6 mm DF inside and 3 mm coremat/core cell and 18 oz
glass outside?

Thank you

Ric


"0_Qed" wrote in message
...
Ric C wrote:
Is Doug Fir acceptable as substitute for okume?

Lumber or plywood ?

Depends on the comparative strengths ...
& the glue_line if plywood.

What about MDO?

MDO is a resin impreg paper overlay ... cures hard & brittle ...
typically on/over a DF plywood panel ...
Suspect on curved applications .