The 2x4, 2x6, 2x8, 2x10, etc lumber that is treated is NOT generally treated for in-ground use. It has only 1/2 the amount of chemical needed for burial as posts, etc.
To get flat dimension lumber treated for in-ground use, you would normally have to special order or get directly from the treating company.
The square pieces: 4x4, 6x6, 8x8 are normally treated to double that amount of chemical. Check the end tags for the pounds per cubic foot that it is treated to.
The old CCA treated material is banned for residential use, and now is ACQ or some other chemical.
CCA can still be used for industrial or farm applications, but you will have to special order, possibly from the company that does the chemical application. (The ban on CCA material is a whole 'nother rant.)
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Today's Featured Article - Oil Bath Air Filters - by Chris Pratt. Some of us grew up thinking that an air filter was a paper thing that allowed air to pass while trapping dirt particles of a particles of a certain size. What a surprise to open up your first old tractor's air filter case and find a can that appears to be filled with the scrap metal swept from around a machine shop metal lathe. To top that off, you have a cup with oil in it ("why would you want to lubricate your carburetor?"). On closer examination (and some reading in a AC D-14 service manual), I found out that this is a pretty ingenious method of cleaning the air in the tractor's intake tract.
... [Read Article]
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