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A board foot is a unit of volume equivalent to 144 cubic inches. To find tons, you would need to know the density of the particular wood that you are interested in.

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Boardfeet is based upon nominal dimensions. For example the nominal dimensions of a 2x4 is 2" x 4". It's actual dimension is closer to 1 1/2 inches x 3 1/2 inches. So there will be some error in the calculation if you are attempted to determine the weight of dimensional lumber. Southern Pine weights approximately 40 lbs per cubic foot. There are 1728 cubic inches in a cubic foot. There are 2000 lbs in a ton. therefore the weight of one board foot (conservatively because of the nominal dimensions) is:

(40x144)/(1728x2000) tons per board foot.

Sorry , don't have a calculator handy.

Another way to do it is that there are about 12 board feet in a cubic foot. So a board foot would weight 40/12 lbs or 3.33 pounds.

3.33 pounds is 3.33/2000 tons. !! a lot easier!!

(southern yellow pine)

glenn

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12y ago

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