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Specific Gravity and Weight of Wood

Civil Engineering and Design
Engineering Fasteners Design and Engineering

Properties of Structural Wood - Specific Gravity and Weight of Wood table.

The following is the average specific gravity and average weight in lbs/ft3 for commercially important species or species combinations of wood.

Wood Species
Specific Gravity1
Weight per ft3
Aspen
0.39
23.6
Balsam Fir
0.36
24.6
Beech Birch Hickory
0.71
46.5
Coast Sitka Spruce
0.39
23.6
Cotton Wood
0.41
27.9
Douglas Fir Larch
0.50
33.6
Douglass Fir Lartch (North)
0.49
33.0
Douglass Fir South
0.46
31.1
Eastern Hemlock
0.41
27.9
Eastern Hemlock Tamarack
0.41
27.9
Eastern Hemlock Tamarack (North)
0.47
31.7
Eastern Softwoods
0.36

24.6

Eastern Spruce
0.41
27.9
Eastern White Pine
0.36
24.6
Engelmann Spruce Lodgepole Pine
(MSR 1650f and higher grades)
0.46
31.1
Engelmann Spruce Lodgepole Pine
(MSR 1500f and higher grades) Hem Fir
0.38
25.9
Hem Fir
0.43
29.2
Hem Fir (North)
0.46
31.1
Mixed Maple
0.55
36.7
Mixed Oak
0.68
44.7
Mixed Southern pine
0.51
34.2
Mountain Hemlock
0.47
31.7
Northern Pine
0.42
28.5
Northern Red Oak
0.68
44.7
Northern Species
0.35
24.0
Northern White Cedar
0.31
21.4
Ponderosa Pine
0.43
29.2
Red Maple

0.58

38.6
Red Oak
0.67
44.1
Red Pine
0.44
29.8
Redwood, close grain
0.44
29.8
Redwood, open grain
0.37
25.3
Sitka Spruce
0.43
29.2
Southern Pine
0.55
36.7
Spruce Pine Fir
0.42
28.5
Spruce Pine Fir (South)
0.36
24.6
Western Cedars
0.36
24.6
Western Cedars (South)
0.35
24.0
Western Hemlock
0.47
31.7
Western Hemlock (North)
0.46
31.1
Western White Pine
0.40
27.2
Western Woods
0.36
24.6
White Oak
0.73
47.7
Yellow Poplar
0.43
29.2

a. Specific gravity based on weight and volume when oven dry.
b. Weight per cubic foot is based on weight and volume as a moisture content of 15%.
c. Applies only to Englemann Spruce Lodgepole Pine machine stress rated (MSR) structural lumber.

Reference: Wood Structural Design Data, American Forest and Paper Association / Council 1992

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