What is the weight of pressure treated lumber 6x6x8'?

Answer 1

Approximately 0.024 lbs per cubic inch. A common pressure-treated 2x6 that is 12 feet long (2x6x144 inches) will weigh 38 to 40 pounds.

Example: a 4" x 12" x 10' pressure treated beam

(note that 10' = 120 inches)

4 x 12 x 120 = 5760 * 0.024 = approx 138 lbs for the beam

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Per cent moisture content has a dramatic impact on wood weight and especially so in the case of PT lumber, which is artificially infused with water during manufacturing and typically takes some weeks and months to dry to equilibrium. I came across the above in trying to research how much moisture my current PT decking has, and the above formula gives 10.0 lbs for the 1" x 5.5" x 76" boards I have (I've got about a dozen). However, their actual weights (measured just this morning) vary between 8.6 lbs and 13.2 lbs (i.e. an 86% to 132% variation from the above formula). Is it even possible (reasonable?) to specify weight for PT lumber without also identifying its per cent moisture content?

So the above would be an average weight.

Answer 2

Honestly, it depends on the moisture content. I have loaded up on these many times and picked up some really wet ones. They are quite noticeable because you go from a (roughly) 6 pound board to a 10 pounder! I put those back on the pile.

Answer 3

.024 per square inch. You need units. Is it .024 lbs, oz, or g per square inch? I have to assume it is 0.024 lbs per square inch.

Answer 4

If dry and stored out of the rain, a 6 x 6 x 8 can weigh around 95 lbs, wet and unseasoned it can weigh up to 110 lbs.

Answer 5

Roughly 192 pounds, depending on moisture content and wood type.

Answer 6

125 lbs

Answer 7

2x8x12

Answer 8

59

Answer 9

120

Answer 10

180