Pressure Treated Lumber

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Old 07-03-06, 08:47 AM
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Pressure Treated Lumber

I have a quick and easy question. Im using some pressure treaded 2X4's to use as braces for lattice installation. Is it ok to bury some of the 2X4 and lattice below ground? They are both PT'd. I am wondering about them rotting if below ground.
 
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Old 07-03-06, 01:36 PM
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IMO that's what pressure treated was designed to do. However, you will get some dissenting opinions here.
If it were me, I would install the 2X4's as you want. The worst that could happen is that 10 or 20 or 30 or 40 years from now they may be rotted and you'll have to replace them.
 
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Old 07-03-06, 01:53 PM
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If I'm not mistaken there is a difference in the PT of framing lumber as opposed to 4x4s and such, supposedly PT 2x4s aren't supposed to be buried but I agree it shouldn't be a big problem for your application.
 
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Old 07-03-06, 02:15 PM
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great, thanks to both of you for the help!
 
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Old 07-03-06, 02:34 PM
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Look for PT thats rated for ground contact.
 
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Old 07-03-06, 03:43 PM
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Pressure Treated Lumber

There are two concentrations -

.25 for exposed to weather

.40 for contact with ground (and concrete, I would assume).

I can't recall seeing anything on buried in the applications, but I may have missed it.

Sometimes a water repellant is also added to stop the rotting process.

The ACQ is a preservative and the industry no longer uses the word "permanent". sometimes a water repellant is also added.

Dick
 
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Old 07-03-06, 05:57 PM
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those treatments .25 and .40 are a indusrty wide for CCA, which is no longer available in residential applications, ACQ is the new treatment i think they are .12 for ab. ground and .21 for ground contact. as long as you specify GROUND CONTACT you will be fine. the thing is no one knows much about ACQ because it has only been around for a few years. thanks to the enviro-MENTAL-ist , they have removed a proven and time tested treatment. IMO ACQ treatment is crap . also you must use fasteners that are specific to ACQ.
 
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Old 07-03-06, 07:39 PM
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Pressure Treated Lumber

The sames formulas apply to AQC as did to the old CCA:

.25 for exposed

.40 for ground contact

I would imagine that there is an identification of the concentration on a label stamp.

Take a look at sutherlands.com for an explanation and details.

Dick
 
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