Hardwood Lumber - Dimensions
Sizing of hardwood lumber.
Dimensional lumber made from hardwood varies from the sizes used for softwood. Hardwood lumber dimensional sizes are indicated below:
| Rough Size | Nominal Size | Actual Dimension (in) | |
|---|---|---|---|
| (Inches) | (Fraction In) ("quarter") | S1S1) | S2S2) |
| 3/8 | 3/16 (4.8 mm) | ||
| 1/2 | 3/8 (9.5 mm) | 5/16 (7.9 mm) | |
| 5/8 | 1/2 (13 mm) | 7/16 (11 mm) | |
| 3/4 | 5/8 (16 mm) | 9/16 (14 mm) | |
| 1 | 4/4 | 7/8 (22 mm) | 13/16 (21 mm) |
| 1 1/4 | 5/4 | 1 1/8 (29 mm) | 1 1/16 (27 mm) |
| 1 1/2 | 6/4 | 1 3/8 (35 mm) | 1 5/16 (33 mm) |
| 1 3/4 | 1 1/2 (38 mm) | ||
| 2 | 8/4 | 1 13/16 (46 mm) | 1 3/4 (44 mm) |
| 3 | 12/4 | 2 13/16 (71 mm) | 2 3/4 (70 mm) |
| 3 1/2 | 3 1/4 (83 mm) | ||
| 4 | 16/4 | 3 13/16 (97 mm) | 3 3/4 (95 mm) |
- 1 inch = 25.4 mm
1) S1S - Surfaced one Side
2) S2S - Surfaced two Sides
Common Hardwood Species
- Oak
- Walnut
- Basswood
- Beech
- Birch
- Butternut
- Chestnut
- Cherry
- Elm
- Gum
- Hickory
- Maple
- Mahogany
- Yellow Poplar
Hardwood Grades
- FAS - First and Second
- best grade - required for a natural or stained finish
- at least 6 inches wide and 8 to 16 feet long
- 83.3% clear wood on the worst face
- Select - No. 1 Common
- minimum 3 inches wide and 4 - 16 feet long
- 66.6% clear wood on the worst face
- Select - No. 2 Common
- Select - No. 3 Common
