I was at Home Depot getting some fence posts and I asked where their selection of 4x4s were located. All I saw was one stack. It was labeled construction select. I asked if they were rated for ground contact and the answer was yes.

So I continued with the same question for 2x4s, 4x6s, etc. I was told all of their PT wood is construction select, 2 or better, and rated for ground contact.

How can this be correct?

Lowes has several options from 2 and better, 3 and better, ground contact, etc etc. Lowes also states clearly what wood species the PT lumber is, whereas HD does not.

Can anyone clarify?

 

Check the tag on the end of the lumber. It will specifically say whether it is for ground contact or not. Please don't take their word for it. They are there to sell you stuff, not give good advice. You will find 5/4 decking boards in two classifications. #2 and premium. The premium has fewer knots and boogers.

 

Ahh thats right. Someone told me that before. Thx. Fyi I just checked and their 2x4s no. 4x4s yes.

Are ground contact 2x4s even available?

 

I don't know of any application where I would put a 2x4 in ground contact, so I'd say probably not.

 

Rip 4x4's rated for ground contact to get your 2x4's.

 

I don't know, Ken, releasing the energy inside a 4x4 could result in warped 2x4's, and possibly expose the core to weather, whereas it was protected somewhat as a complete board.

 

What do you plan on using a 2 X 4 below grade for?
And yes ripping any 4 X 4, 4 X 6 ECT. is a bad idea.
It's not treated to the core through the whole board.

 

i simply won't buy structural lumber of any kind at a big box mega-mart homecenter. All too often the material they sell is warped, not square or true or will fail while being cut to fit.

The lumber I buy from a REAL lumberyard has no such defects and I specify number 2 or better. Yes, it does cost a bit more but the ease in using it makes up for the increased cost.

 

Yes, but you may have to special order them. You will not find them at a big box store!