"Daniel" wrote in message
om...

Certificated by whom? Anybody with a chainsaw & a porta-mill can
declare whatever grade they wish on any lumber they produce. Heck,
take the basic quality designations for #2 construction lumber & see
what percentage of the ordinary wall studs at Big Orange even meet the
specs stamped on them. I think a plane builder is far better off
performing his/her own pass/fail inspections than trusting Larry the
Lumberjack to have done so correctly at the mill.

Just like adhesives.

Rich S.