from which tree?

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Old 08-04-09, 05:16 AM
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from which tree?

I looked up lumber size in relation to building applications such as joist span etc. The lumber sizes depended on the tree that it came from. How can I tell which species of pine the lumber I purchase is? I live in a Mid Atlantic state and buy from Lowe's or one of the local lumber yards. All the framing lumber looks much the same no matter were I buy it. The following was printed on a particular 2x4 I bought: s-p-f, KD-HT, 39, NLGA.

Thanks
Jerry
 
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Old 08-04-09, 06:00 AM
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I could go into a long dissertation concerning various grades and specs, but this web site will tell you just about everything you want to know - and probably more.

G5053 Softwood Lumber Grades | University of Missouri Extension
 
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Old 08-04-09, 11:05 AM
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Thanks George - looks like I have Spruce , pine , fir.
 
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Old 08-06-09, 04:21 PM
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S-P-F is good for studs but I would not use it for anything else. In some areas you are not allowed to use anything for framing other than Hem Fir. Lowe's and HD both carry Hem Fir material although it is not always the best quality.

Bill
 
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Old 08-08-09, 05:04 AM
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Always a good idea to check local codes.

Where I live (in Virginia) it is allowable to use SPF lumber in a number of applications other than studs.

Another common choice is SYP - Southern Yellow Pine. The company I work for builds floor & roof trusses. Code requires SYP for these applications. This is sypical in the mid atlantic states.

Doug & Hem fir is more common in the west & midwest.

If you check out the span calculator in the post above you can see the relative strength of different species.
 
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