Here's a strange question.

I have been looking for food grade crates to buy for storing

lots of veggies. I mentioned this to an old woodworking

friend and he mentioned having tons of scrap wood and he would be more than happy to make me a bunch for free.

I questioned whether it needed to be a food grade wood and he just shrugged it off. So my question.

How do I know what kind of woods are safe to use for direct contact with food? I mean, if they're gonna be free, I won't have to buy any. He has all different kinds of wood he could use.

Thanks,

Tom