>It's possible to use pressure-treated lumber to support an aluminum deck, although, of course, it is a toxic material. I don't think pressure treated lumber i

>It's possible to use pressure-treated lumber to support an aluminum deck, although, of course, it is a toxic material. I don't think pressure treated lumber involves arsenic anymore. It used to, but due to lawsuits and the EPA threatening to crack down on it, the industry moved away from it.