ThomD
>Often the wood used in decks is of super high quality. Really a sin that so much redwood and cedar were wasted on such cheap and short term uses when much of it was spar or instrument grade wood we won't see again.

Leaving out damaged stuff, structurally the reuse depends on how heavily the wood was deflected in use. If adequate joist were used then the wood does not deflect significantly and it retains it's structural qualities. Obviously that isn't a concern in the uses mentioned anyway.