[juanbenae]

The other thing is pressure treated lumber is like most lumber these days and is not dense old growth and will rot pretty dam fast. Today's redwood is the same, and not much better. See the 1x6 slats that are as much white as they are red.

The PT being usually a doug-fir is a joke 4x or 6x. Too much soft new growth product that is very cellulose and even if using PT it absorbs moisture quickly. If I were building a fence, I'd look to get even cyclone fence post driven w/o concrete and then go to the wood. The companies that do cyclone have pneumatic drivers, imagine an air powered T-post driver...