Which material for shelving?

[Dave Plowman (News)]

No wood is. That's one of its virtues.

[Vir Campestris]

I just spent my day in a plywood boat. It seems pretty rigid to me.

Andy

[The Natural Philosopher]

The boat maybe. The plywood? Nope.

[dennis]

Jumbo jet wings are very rigid, but they bend by several metres in flight. Just as well they do or they would break.

[Adrian Caspersz]

Yup, I found that :-(