Building and Carpentry

Units of Measure

Weight and Mass

# What is the weight of dried Oak wood i.e. lb per cubic foot or lb per square foot of .75 inch board?

###### Wiki User

###### July 03, 2007 5:01PM

The weight of dry, seasoned Oak depends on it's type (English

Oak, Red Oak Cork Oak etc), but will be in the range of 590 to 930

kg/cubic metre. This is an enormous variation, but there are lots

of varieties. To convert kg/m³ to lbs/cu ft divide by 16.01846. If

you know the specific type of Oak you are working with, the answer

can be more precise.

## Related Questions

###### Asked in Oak Trees

### What is the average mass of an oak tree?

The oven-dried weight of 8.66 tons (7.86 tonnes) is the mass --
which varies by species -- of a 78.41-foot- (23.9-meter-) tall,
15.5-ton (14.38-tonne), 222-year-old oak tree in the OneOak project
through the Sylva Foundation. That represents a 58.39-foot-
(17.8-meter-) diameter crown oven-dried weight of 4.88 tons (4.43
tonnes) and a 35.35-inch- (89.8-centimeter-) tall main trunk
oven-dried weight of 3.78 tons (3.43 tonnes). The mass of oak wood
tends toward 1,300.73 to 2,050.3 pounds per cubic foot (590 to 930
kilograms per cubic meter).

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###### Asked in Building and Carpentry, Interior Design

### What is the weight of dimensional lumber?

It depends upon the species as weights can very greatly, even
among softwoods, such as pine, fir, or especially cedar or cypress.
Additionally, moisture content and treatments can impact the
finished weight. Southern Yellow pine, fresh cut varys from 36
lbs/cubic foot (20% moisture) to 53 lbs/cubic foot for fresh cut
(green). Pressure treating also adds additional moisture, thus
weight.
If the lumber is from a lumber yard, not treated, kiln dried,
dimensional pine lumber would typically weigh 37 lbs / cubic foot,
so a 16' 2 x 4, actually 16' 1.5" x 3.5" would be:
1.5 X 3.5 X 192 = 1008 cubic inches
1728 cubic inches in a cubic foot so:
1008 / 1728 = 0. 583 cubic feet
weight of pine = 37 lbs/cubic foot X 0.583 = 21.58 lbs for a 16'
2" x 4".
or
1 1/2" = 0.125 cubic feet
3 1/2" = 0.292 cubic feet
.125 X .292 X 16 = 0.583

###### Asked in Weight and Mass, Temperature

### What does moisture content mean?

In foods, this indicates the percentage of water in the total
weight of the food. This exceeds the dry weight, and is a portion
of the water used in processing.
In lumber, this indicates the remaining water after drying of
the wood. Kiln-dried lumber will normally have a lower moisture
content than air-dried.