| Douglas Fir | White Oak | Red Oak | Teak | Ipe | |
|---|---|---|---|---|---|
| Color* | 3 | 1 | 1-3 | 1-2 | 4 |
| Density | 30-40 | 40-50 | 40-50 | 40-50 | >60 |
| Bending Strength (psi) | 12,000-14,500 | 14,500-17,000 | 12,000-14,500 | 12,000-14,500 | >19,500 |
| Stiffness (psi) | 1,800-2,200 | 1,400-1,800 | 1,800-2,200 | 1,000-1,800 | >3,000 |
| Crushing Strength (psi) | 7,000-8,000 | 7,000-8,000 | 6,000-7,000 | 6,000-9,000 | >10,000 |
| Toughness | 3 | 4 | 4 | 2 | 7 |
| Hardness | 2 | 4 | 4 | 3-4 | 7 |
| Movement | Small under 3.0 | Medium 3.0-4.5 | --- | Small, under 3.0 | Small, under 3.0 |
| Shrinkage Radial | 3 | 4 | 3 | 1 | 5 |
| Shrinkage Tangential | 3 | 5 | 4 | 2 | 4 |
| Heartwood Durability | Moderately durable | Durable | Nondurable | Very durable | Very durable |
| Heartwood Treatability † | 4 | 4 | 2 | 4 | 4 |
* Color Code
- Whitish, pale brown, pale yellow, straw
- Dark brown
- Pink or red tints, including red brown
- Other colors (black, purple, bright yellow, etc.)
† Treatability
- Permeable
- Moderately resistant
- Resistant
- Extremely resistant