Noble fir
Abies procera
Noble fir measures 410 lbf on the Janka scale, about 32% as hard as northern red oak.
- Only cuangare, sande and banak are stiffer for their weight.
- American basswood has exactly the same Janka figure.
- Across all 155 woods it falls in the bottom fifth for hardness and density.
U.S. hardwoodsU.S. softwoodsImported woodsNorthern red oak
Six measures
Noble firU.S. softwoods medianOther woods
Janka hardness
410 lbf1,824 N14th softest of 15529th of 37 U.S. softwoods240 lbf3,680 lbfDensity
0.370.39 at 12% MC23rd lightest of 1550.250.96Bending strength
10,700 psi73.8 MPa45th weakest of 1554,300 psi29,900 psiCupping tendency
1.9352nd highest of 1551.092.90Shrinkage across the face
8.3%radial 4.3%63rd highest of 1553.5%12.7%Stiffness
1.72 M psi11.9 GPa70th stiffest of 1550.54 M psi4.06 M psi
For its weight: stiffness-to-weight 4.65 (4th of 155).
How much it moves
Both its face shrinkage (8.3%) and its T/R ratio (1.93) sit in the middle half of the list.
0.50 in.
off a 6-inch flatsawn board, green to oven-dry; quartersawn 0.26 in.
- Tangential
- 8.3%
- Radial
- 4.3%
- Volume
- 12.4%
- T/R ratio
- 1.93 (102nd most stable of 155)
End view, shrinkage drawn 3× life size.
Closest substitutes
- Pacific silver fir
5% harder · 8% heavier · shrinks 0.9 points more across the face
- California red fir
22% harder · 3% lighter · shrinks 0.4 points less across the face
- Sitka spruce
24% harder · same density · shrinks 0.8 points less across the face
Among the true firs
5th hardest of 7, lbf.
Laboratory values
Its most unusual laboratory figure is tension across the grain: 2nd lowest of the 73 woods with a published value.
| Property | Green | Dry, 12% MC | Change when dried | Metric, 12% MC |
|---|---|---|---|---|
| Tension perpendicular | 230psi | 220psi | −4% | 1.50MPa |
| Side hardness | 290lbf | 410lbf | +41% | 1,824N |
| Shear parallel to grain | 800psi | 1,050psi | +31% | 7.20MPa |
| Compression perpendicular | 270psi | 520psi | +93% | 3.60MPa |
| Impact bending | 19in. | 23in. | +21% | 584mm |
| Work to maximum load | 6.00in-lbf/in³ | 8.80in-lbf/in³ | +47% | 60.7kJ/m³ |
| Modulus of rupture | 6,200psi | 10,700psi | +73% | 73.8MPa |
| Compression parallel to grain | 3,010psi | 6,100psi | +103% | 42.1MPa |
| Modulus of elasticity | 1.38M psi | 1.72M psi | +25% | 11.9GPa |
Wood Handbook Table 5-3b, Table 4-3. Data & method · Guides