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SUMMARY
OF HARDWOOD FACE GRADE CHARACTERISTICS
ROTARY CUT
Ash,
Birch and Maple (See
Pictures)
| Cut |
Rotary-Cut
|
| Grade
Description |
AA
|
A
|
B
|
C
|
D
|
E
|
|
Color
and Matching |
White
|
Red
|
White
|
Red
|
Nat.
|
White
|
Red
|
Nat.
|
|
|
|
| Sapwood |
Yes
|
No
|
Yes
|
No
|
Yes
|
Yes
|
No
|
Yes
|
Yes
|
Yes
|
Yes
|
| Heartwood |
No
|
Yes
|
No
|
Yes
|
Yes
|
No
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
|
Color
Streaks or Spots |
Slight
|
Slight
|
Yes
|
Yes
|
Yes
|
Yes
|
|
Color
Variation |
No
|
Slight
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
| Sharp
Color Contrasts at Joints |
No
|
No
|
No
|
Yes
|
Yes
|
Yes
|
|
Type
of Matching
|
| Sequence
Matched
Book Matched
Slip Matched
Pleasing Matched
|
No
Yes
Specify
---
|
No
No No Yes
Specify
---
|
No
Specify
Specify
Yes
|
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| Nominal
Minimum Width of Components in Face |
6"
|
5"
|
4" If book or
slip
|
No limit
|
No limit
|
No limit
|
|
Natural
Characteristics
|
| Small
Inconspicuous Burls & Pin
Knots - Combined Avg. No.
|
1 per 5 sq. ft.
6 per 4'x8' panel
|
1 per 3 sq. ft.
10 per 4'x8' panel
|
1 per 2 sq. ft.
16 per 4'x8' panel
|
No limit
|
No limit
|
No limit
|
| Burls
- Max. Size |
1/8"
|
1/4"
|
1/2"
|
No limit
|
No limit
|
No limit
|
Knots
Max. Size
Dark Part
Total |
|
1/4"
|
1/8"
|
No limit
|
No limit
|
No limit
|
| Scattered
Sound and Repaired
Knots - Combined Avg. No.
Max. Size - Sound
Max. Size - Repaired
Avg. No. - Repaired
|
No
|
No
|
1 per 8 sq. ft.
4 per 4'x8' panel
3/8"
1/8"
1 per 8 sq. ft.
|
1 per 4 sq. ft.
8 per 4'x8' panel
1/2"
1/2"
1 per 8 sq. ft.
|
1 per 3 sq. ft.
10 per 4'x8' panel
1"
3/4"
1 per 6 sq. ft.
|
No limit
1 1/2"
1"
1 per 2 sq. ft.
|
| Mineral
Streaks |
No
|
Slight
|
Slight
|
Yes
|
Yes
|
Yes
|
| Bark
Pockets |
No
|
Few to 1/16"
|
Few to
1/8"x1"
|
Few to
1/4"x2"
|
1/4"x2"
|
Yes
|
| Worm
Tracks |
No
|
No; Ash, slight
|
Slight; Ash, yes
|
Few; Ash, yes
|
Yes
|
Yes
|
| Vine
Marks |
No
|
Slight
|
Yes
|
Yes
|
Yes
|
Yes
|
| Cross
Bars |
No
|
Slight
|
Yes
|
Yes
|
Yes
|
Yes
|
|
Manufacturing
Characteristics
|
| Rough
Cut |
No
|
No
|
Slight
|
Two 8" dia.
area or equivalent
|
5% of panel
|
Yes
|
| Blended
Repaired Tapering Hairline Splits |
Two
1/32"x3" on panel ends only
|
Two
1/16"x6"
|
Four
1/8"x8"
|
Four
3/16"x8"
|
Six
1/4"x10"
|
Yes
|
| Repairs |
Very small
inconspic.
|
Small
Insconspicuous
|
Inconspicuous
|
Yes
|
Yes
|
Yes
|
|
Special
Characteristics
|
| Select
and Uniform Colour |
Red only avail in
Birch
|
Red only avail in
Birch
|
Red only avail in
Birch
|
|
|
Maple:
Few sugar marks permitted
|
Unfilled worm holes, open
splits, open joints, open bark pockets, shake or doze not permitted in
above grades. One inch = 25.4 mm; one sq. ft. = 0.0929 square meters.
Notes:
Under Color and Matching, Red (R), available
in Birch only, Brown (B), available in Ash only.
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