Lumber Dimensions
You may have noticed that 2 x 4's are not actually a 2" by 4" board. Rough sawn, it is a true 2 x 4 but drying and planing reduces finished size to 1.5" x 3.5". Following is a table of the sizes commonly found in the big box stores.
| Nominal |
Actual |
| 1"x2" |
3/4" x 1-1/2" |
| 1"x4" |
3/4" x 3-1/2" |
| 1"x6" |
3/4" x 5-1/2" |
| 1"x8" |
3/4" x 7-1/4" |
| 1'x10" |
3/4" x 9-1/4" |
| 1"x12" |
3/4" x 11-1/4" |
| 2"x4" |
1-1/2 x 3-1/2" |
| 2"x6" |
1-1/2" x 5-1/2" |
| 2"x8" |
1-1/2" x 7-1/4" |
| 2"x10" |
1-1/2" x 9-1/4" |
| 2"x12" |
1-1/2" x 11-1/4" |
| 4"x4" |
3-1/2" x 3-1/2" |
| 4"x6" |
3-1/2" x 5-1/2" |
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