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Walnut
Specific
Gravity
0.659
0.608
0.612
0.613
0.667
0.551
0.594
Density
kg/m3)
740
670
690
690
750
610
660
Hardness
7290
5930
6170
7050
6490
4630
5910
Bending
Strength
(MPa)
115
106
98.7
108
116
87.1
103
Stiffness
(MPa)
14100
14100
11900
12800
14000
11900
13100
Stability
**
**
***
***
**
**
****
Sandability
**
**
**
*
***
****
***
Nailability
**
**
****
**
*
*
*
Stainability
**
***
**
**
**
***
***
EXCELLENT: **** VERY GOOD *** GOOD: ** FAIR: *
STANDARD INDUSTRY GRADES
FINISHED UNFINISHED
Clear
Select and Better
#1 Common
#2 Common		 Select & Better
#1 Common
STANDARD DIMENSIONS AVAILABLE
Thickness
in. (mm)		 25/32" (19.8 mm) 3/4" (19 mm)
Width
in (mm)		 1 1/2" (38.10 mm)
1 3/4" (44.45 mm)
2" (50.80 mm)
2 1/4" (57.15 mm)
2 1/2" (63.50 mm)
3 1/4" (82.55 mm)		 2 1/4" (57.15 mm)
2 1/2" (63.50 mm)
3 1/4 (82.55 mm)
TYPES OF FINISH AVAILABLE
High gloss Semi-gloss Matte
> 75% gloss 50-75% gloss < 50% gloss
GRADE SPECIFICATIONS FOR HARDWOOD STRIP FLOORING
Standard grading allowance; maximum of 5% below the actual grade. Also available in a combination of grades.
CLEAR
  • Best appearance.
  • Selected for uniformity of light color.
  • Slight variation in the natural sapwood color (sticker stain is not considered a defect).
  • Limited small character marks.
  • Pin knots allowed.
  • Mineral streaks of less than 1/8" and 1" (3 x 25 mm).
  • No checks or splits.
  • Minimum length: 12" (30 cm).
SELECT & BETTER
  • Combination of clear and select grades.
  • The most standard high grade hardwood flooring sold on the world market.
  • Excellent appearance.
  • Variation in the natural sapwood color (sticker stain is not considered a defect).
  • Limited character marks.
  • Sound knots of less than 1/8" (3 mm).
  • Mineral streaks of less than 1/8" x 4" (3 x 100 mm).
  • No stains, checks, or splits.
  • Minimum length: 12" (30 cm).
#1 COMMON
  • Variegated appearance.
  • All color variations allowed.
  • Sound knots less than 3/8" (10 mm), flags, worm holes and mineral streaks are allowed.
  • No splits, holes or voids.
  • Minimum length: 10" (25 cm).
#2 COMMON
  • Rustic appearance.
  • All color variations allowed.
  • All characteristics of species allowed.
  • A serviceable floor after knot holes, worm holes, checks, splits, and other imperfections are filled and finished.
  • Minimum length: 10" (25 cm).