Table 1 Softwood Lumber Sizes
Minimum standard dressed sizes at the time of manufacture for both unseasoned (green) and dry lumber.
ProductClassification(Nominal Size) | Minimum Dressed Sizes(See Note 2) | |
Unseasoned | Dry | |
Inches | Inches | Inches |
Dimension Lumber | ||
2 x4 | 1-9/16 x3-9/16 | 1-1/2 x3-1/2 |
2 x6 | 1-9/16 x5-5/8 | 1-1/2 x5-1/2 |
2 x8 | 1-9/16 x7-1/2 | 1-1/2 x7-1/4 |
2 x 10 | 1-9/16 x9-1/2 | 1-1/2 x9-1/4 |
2 x 12 | 1-9/16 x 11-1/2 | 1-1/2 x 11-1/4 |
(See Agency note 1) | ||
Board Lumber | ||
1 x4 | 25/32 x3-9/16 | 3/4 x3-1/2 |
1 x6 | 25/32 x5-5/8 | 3/4 x5-1/2 |
1 x8 | 25/32 x7-1/2 | 3/4 x7-1/4 |
1 x 10 | 25/32 x9-1/2 | 3/4 x9-1/4 |
1 x 12 | 25/32 x 11-1/2 | 3/4 x 11-1/4 |
Agency note 1. The dry thicknesses of nominal 3 inch and 4 inch lumber are 2-1/2 inches and 3-1/2 inches. Unseasoned thicknesses are 2-9/16 inches and 3-9/16 inches. Widths for these thicknesses are the same as shown above.
Agency note 2. Dry lumber is defined as being 19 percent or less in moisture content and unseasoned lumber as being over 19 percent moisture content.
Md. Code Regs. 15.03.03.05