### Author Topic: Pressure Treated Lumber Weight??  (Read 36994 times)

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#### optionguru

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##### Pressure Treated Lumber Weight??
« on: July 10, 2007, 07:29:34 AM »
Does anyone know the approximate weight of a pressure treated 8 foot 2x6?  I know they can vary greatly but I'm trying to figure out how much bouyancy I need for a floating raft I'm building.

Thanks,
Peter

#### glenn kangiser

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##### Re: Pressure Treated Lumber Weight??
« Reply #1 on: July 10, 2007, 02:31:14 PM »
Looks like 30 to 40 lbs cu ft.   8 ft 2x6 = 4 ft 2x12 = 4 x 1" x 12 + 4 x 1/2 x 12 = 6x12x12  = about 15 to 20 lbs
"Always work from the general to the specific." J. Raabe

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#### John_C

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##### Re: Pressure Treated Lumber Weight??
« Reply #2 on: July 10, 2007, 02:34:09 PM »
How much weight does treatment add to the weight of wood?

Most of the weight added to treated wood comes from water used to solubilize the preservative components. A freshly treated piece of lumber may contain as much as 4.5 gallons of water per cubic foot or about 38 lbs. per cubic foot. As the wood dries and the water evaporates, only the preservative will remain. Lumber tagged for above-ground use should contain 0.25 pounds preservative per cubic foot and, for ground contact, 0.40 pounds per cubic foot.

Source

http://www.treatedwood.com/products/generalfaq.html#3

#### optionguru

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##### Re: Pressure Treated Lumber Weight??
« Reply #3 on: July 11, 2007, 03:46:45 AM »
It is amazing the difference when you go to a big box store.  I was building a deck last weekend and one piece of lumber could easily weigh double the next depending on how wet it was.  Thanks for the info guys.

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