Structural Lumber  Properties
Properties of structural lumber.
Nominal Dimension (in)  Actual Dimension (in)  Area (in^{2})  Section Modulus  S  (in^{3})  Moment of Inertia  I  (in^{4})  Weight (lb/ft) 

1 x 3  0.75 x 2.5  1.875  0.47  
1x 4  0.75 x 3.5  2.625  0.64  
1 x 6  0.75 x 5.5  4.125  1.0  
1 x 8  0.75 x 7.25  5.4375  1.3  
1 x 10  0.75 x 9.25  6.9375  1.7  
1 x 12  0.75 x 11.25  8.4375  2.1  
2 x 3  1.5 x 2.5  3.75  1.56  1.95  0.9 
2 x 4  1.5 x 3.5  5.25  3.06  5.36  1.3 
2 x 6  1.5 x 5.5  8.25  7.56  20.8  2.0 
2 x 8  1.5 x 7.25  10.875  13.1  47.6  2.6 
2 x 10  1.5 x 9.25  13.875  21.4  98.9  3.4 
2 x 12  1.5 x 11.25  16.875  31.6  178  4.1 
3 x 2  2.5 x 1.5  3.75  0.94  0.70  0.9 
3 x 4  2.5 x 3.5  8.75  5.10  8.93  2.1 
3 x 6  2.5 x 5.5  13.75  12.6  34.7  3.3 
3 x 8  2.5 x 7.25  18.125  21.9  79.4  4.4 
3 x 10  2.5 x 9.25  23.125  35.7  165  5.6 
3 x 12  2.5 x 11.25  28.125  52.7  297  6.8 
4 x 2  3.5 x 1.5  5.25  1.31  0.98  1.3 
4 x 3  3.5 x 2.5  8.75  3.64  4.56  2.1 
4 x 4  3.5 x 3.5  12.25  7.15  12.5  3.0 
4 x 6  3.5 x 5.5  19.25  17.6  48.5  4.7 
4 x 8  3.5 x 7.25  25.375  30.7  111  6.2 
4 x 10  3.5 x 9.25  32.375  49.9  231  7.9 
4 x 12  3.5 x 11.25  39.375  73.8  415  9.6 
6 x 2  5.5 x 1.5  8.25  2.1  1.55  2.0 
6 x 3  5.5 x 2.5  13.8  5.7  7.16  3.3 
6 x 4  5.5 x 3.5  19.3  11.2  19.7  4.7 
6 x 6  5.5 x 5.5  30.3  27.7  76.3  7.4 
6 x 8  5.5 x 7.5  41.3  51.6  193  10.0 
6 x 10  5.5 x 9.5  52.3  82.7  393  12.7 
6 x 12  5.5 x 11.5  63.3  121  697  15.4 
8 x 2  7.25 x 1.5  10.9  2.7  2.04  2.6 
8 x 3  7.25 x 2.5  18.1  7.6  9.44  4.4 
8 x 4  7.25 x 3.5  25.4  14.8  25.9  6.2 
8 x 6  7.5 x 5.5  41.3  37.8  104  10.0 
8 x 8  7.5 x 7.5  56.3  70.3  264  13.7 
8 x 10  7.5 x 9.5  71.3  113  536  17.3 
8 x 12  7.5 x 11.5  86.3  165  951  21.0 
8 x 14  7.5 x 13.5  101  228  1538  24.6 
8 x 16  7.5 x 15.5  116  300  2327  28.3 
10 x 10  9.5 x 9.5  90.3  143  679  21.9 
10 x 12  9.5 x 11.5  109  209  1204  26.6 
10 x 14  9.5 x 13.5  128  289  1948  31.2 
10 x 16  9.5 x 15.5  147  380  2948  35.8 
10 x 18  9.5 x 17.5  166  485  4243  40.4 
12 x 12  11.5 x 11.5  132  32.1  
12 x 14  11.5 x 13.5  152  37.7  
12 x 16  11.5 x 15.5  178  43.3 
 1 in = 25.4 mm
 1 in^{2} = 6.45x10^{2} mm^{2}
 1 in^{3} = 1.64x10^{4} mm^{3}
 1 in^{4} = 4.16x10^{5} mm^{4}
 1 lb/ft = 1.49 kg/m
Based on standard commercially available lumber within the USA.
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