 |
Lumber Sizes
| Boards |
|
Nominal |
Actual |
Actual - Metric |
| 1" x 2" |
3/4" x 1-1/2" |
19 x 38 mm |
| 1" x 3" |
3/4" x 2-1/2" |
19 x 64 mm |
| 1" x 4" |
3/4" x 3-1/2" |
19 x 89 mm |
| 1" x 5" |
3/4" x 4-1/2" |
19 x 114 mm |
| 1" x 6" |
3/4" x 5-1/2" |
19 x 140 mm |
| 1" x 7" |
3/4" x 6-1/4" |
19 x 159 mm |
| 1" x 8" |
3/4" x 7-1/4" |
19 x 184 mm |
| 1" x 10" |
3/4" x 9-1/4" |
19 x 235 mm |
| 1" x 12" |
3/4" x 11-1/4" |
19 x 286 mm |
| 1-1/4" x 4" |
1" x 3-1/2" |
25 x 89 mm |
| 1-1/4" x 6" |
1" x 5-1/2" |
25 x 140 mm |
| 1-1/4" x 8" |
1" x 7-1/4" |
25 x 184 mm |
| 1-1/4" x 10" |
1" x 9-1/4" |
25 x 235 mm |
| 1-1/4" x 12" |
1" x 11-1/4" |
25 x 286 mm |
| 1-1/2" x 4" |
1-1/4" x 3-1/2" |
32 x 89 mm |
| 1-1/2" x 6" |
1-1/4" x 5-1/2" |
32 x 140 mm |
| 1-1/2" x 8" |
1-1/4" x 7-1/4" |
32 x 184 mm |
| 1-1/2" x 10" |
1-1/4" x 9-1/4" |
32 x 235 mm |
| 1-1/2" x 12" |
1-1/4" x 11-1/4" |
32 x 286 mm |
| 2" x 4" |
1-1/2" x 3-1/2" |
38 x 89 mm |
| 2" x 6" |
1-1/2" x 5-1/2" |
38 x 140 mm |
| 2" x 8" |
1-1/2" x 7-1/4" |
38 x 184 mm |
| 2" x 10" |
1-1/2" x 9-1/4" |
38 x 235 mm |
| 2" x 12" |
1-1/2" x 11-1/4" |
38 x 286 mm |
| 3" x 6" |
2-1/2" x 5-1/2" |
64 x 140 mm |
| 4" x 4" |
3-1/2" x 3-1/2" |
89 x 89 mm |
| 4" x 6" |
3-1/2" x 5-1/2" |
89 x 140 mm |
|
| Nominal Size: This is the size that a piece
of lumber is before it is seasoned and treated; these are the sizes we all
commonly know and use as reference...exactly like a quarter pound burger is only
a quarter pound before it's cooked. |
| Actual Size: This refers to the minimum
acceptable size after the lumber has been seasoned and treated.
However, we still use the nominal sizes; you don't typically hear someone
ordering a one-and-a-half by a three-and-a-half when they want a two-by-four. |
|
Framing Lumber |
|
Nominal Size |
Actual Size |
| 2 x 2 |
1 ½ x 1
½ |
| 2 x 3 |
1 ½ x 2 ½ |
| 2 x 4 |
1 ½ x 3 ½ |
| 2 x 6 |
1 ½ x 5 ½ |
| 2 x 8 |
1 ½ x 7 ¼ |
| 2 x 10 |
1 ½ x 9 ¼ |
| 2 x 12 |
1 ½ x 11 ¼ |
| 4 x 4 |
3 ½ x 3 ½ |
| 4 x 6 |
3 ½ x 5 ½ |
| 4 x 10 |
3 ½ x 9 ¼ |
| 6 x 6 |
5 ½ x 5 ½ |
|