|
Cut |
Plain-Sliced (Flat-Cut), Quarter-Cut, Rotary Cut |
|
Grade
Description |
A |
B |
C |
|
|
Red |
White |
Red |
White |
|
|
Color and Matching |
|
Sapwood |
5% |
Yes |
10-20% |
Yes |
Yes |
|
Heartwood |
Yes |
Yes |
Yes |
Yes |
Yes |
|
Color
Streaks or Spots |
Yes |
Yes |
Yes |
|
Color
Variation |
Slight |
Yes |
Yes |
|
Sharp
Color Contrasts at Joints |
No |
No |
Yes |
|
Type of Matching |
|
Book Matched |
|
Slip Matched |
|
Pleasing Matched |
|
|
|
|
|
Nominal Minimum |
Plain-S. |
|
Width of Face |
Quarter |
|
Components |
Rotary |
|
|
|
No Limit |
|
Natural Characteristics |
|
Small Conspicuous Burls & Pin Knots - Combined Avg. Number |
1 per 2-2/3 sq ft
12 per 4 ft x 8 ft panel |
1 per 1-1/3 sq ft
24 per 4 ft x 8 ft panel |
No Limit |
|
Conspicuous Burls - Max. Size |
3/8 in. |
1/2 in. |
No Limit |
|
Conspicuous Pin Knots |
|
Avg. Number |
|
Max. Size: Dark Part |
|
Total |
|
|
1 per 3 sq ft |
|
10 per 4' x 8' panel |
|
1/8 in. |
|
1/4 in. |
|
|
1 per 2 sq ft |
|
16 per 4' x 8' panel |
|
1/8 in. |
|
1/4 in. |
|
No Limit |
|
Scattered Sound and Repaired
Knots - Combined Avg. Number |
|
Max Size - Sound |
|
Max Size - Repaired |
|
Avg. No. - Repaired |
|
No |
|
1 per 8 sq ft |
|
4 per 4 ft x 8 ft panel |
|
3/8 in. |
|
1/8 in. |
|
1 per 8 sq ft |
|
|
1 per 4 sq ft |
|
4 per 4 ft x 8 ft panel |
|
1/2 in. |
|
1/2 in. |
|
1 per 8 sq ft |
|
|
Mineral Streaks |
Slight, Blending |
Few to 12 in. |
Yes |
|
Bark
Pockets |
No |
Few to 1/8 in. x 1 in. |
Few to 1/4 in. x 2 in. |
|
Worm
Tracks |
No |
Slight |
Few |
|
Vine
Marks |
Slight |
Yes |
Yes |
|
Cross
Bars |
Slight |
Yes |
Yes |
|
Manufacturing Characteristics |
|
Rough
Cut / Ruptured Grain |
No |
Slight |
Slight |
|
Blended Repaired Tapering Hairline Splits |
Two
1/16 in. x 6 in. |
Four
1/8 in. x 8 in. |
Four
3/16 in. x 8 in. |
|
Repairs |
Small Blending |
Blending |
Yes |
|
Special Characteristics |
|
Ray
Fleck |
Slight, Blending |
Slight, Blending |
Yes |
|
Rift
and Comb Grain |
Rift
permits 1 inch in 12 inches maximum grain slope, 2-1/2 inches
in 12 inches minimum grain sweep, fleck not to exceed 3/8 inch
in width. Comb permits 1/2 inch in 12 inches maximum
gain slope, 1/2 inch in 12 inches maximum grain sweep, fleck
not to exceed 3/32 inch in width. |
