[s_morrison57]

I ship a lot of stuff internationaly and you have to use heat treated wood , it comes with a reconized stamp that tells customs it is properly heat treated , if it doesn't have the stamping a lot of countries won't except it. They worry about parisites infecting their forests, plywood does not need the stamp cause of the heat involved in the manafacturing. Canada to the states is ok with regular 2x4's etc as both governments consider our forests to be similar in terms of bugs and parasites although this may change in the future