#2 Pressure Treated Lumber
[This message has been edited by Altereagle (edited June 25, 2003).]
We treat both #1 and #2 Southern Yellow Pine at my plant. Since SYP makes up most of the pressure-treated lumber that's produced in the US, it's a good bet that BrianZ will be using SYP. That said, there is a distinct visual difference between the two, as well as a slight structural difference. There are less wane and knots allowed per SPIB grading rules in a #1 than there is in a #2. That alone is a big difference visually. #1 material is generally slightly stronger than #2, but I don't see any reason to go wild and use #1 material on the joists and ledger board on the deck. Additionally, your posts are generally going to be #2 if they are 6x6's, as #1 is very difficult to come by in SYP timbers.
Decking will be either PREM or STD, Premium being the equivalent of a #1, and STD a #2. I'm not a big fan of using 2x6 as decking. I'd rather go with a 5/4x6 radiused edge decking. And if it was my deck, I'd use premium decking. It's just a lot better than the standard.
I hope this helps Brian...
[This message has been edited by JayF (edited June 29, 2003).]
Here on the west coast we wouldn't even think of using a treated lumber as a finish, we use composites, redwood, cedar & some exotics like ipe (pronounced eepay)among many... but never a treated lumber.
Thanks for clearing that up, I recall using treated pine back east but haven't for so many years never thought of that as an application even!
Weight bearing capacity of wood beams
Flashing Over the New Type Pressure Treated Lumber?
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