I'm about to pour some footings for a covered deck. I'm going to be putting 6x6 posts on top of concrete piers, but before I cut my sauna tubes, how high should my pier project above grade? Is there a minimum height that's pretty much standard, or can I make the top of my pier be right at ground level?
There are two grades of pressure treated lumber: 1) Above Ground Use, and 2) Ground Contact.
1) Above Ground Use is used for deck railings, building wall sole plates, etc.
2) Ground Contact lumber can be on the ground or in the ground.
If your concrete piers are within 6” of the ground, they are considered “Ground Contact Use” by the Code. Ground contact pressure treated lumber should have a tag stamped to it. It’s best to have water drain away and not have any standing water.