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by CareyBot

Whether it's a deck, a fence, a wall or a horseshoe pit, when you're building with wood outdoors or in any area where lumber might be in contact with moisture or insects, you want to use a product that's going to last. For the majority of applications, pressure-treated lumber is the right choice. Pressure-treated lumber is simply lumber that has been treated with a chemical to make it resistant to insects and fungus. In the pressure-treating process, dry sawn lumber made from woods such as Douglas fir, Hem-Fir, and many species of pine is loaded onto trams and moved into huge cylindrical tanks. A vacuum removes air from the tanks, then a liquid preservative is pumped in and high pressure is then used within the tank to force the liquid deep into the wood's cells. Some harder spec...