Specification

24 columbiaforestproducts.com Hardwood Plywood Grading Guide 2015
ANSI/HPVA HP-1-2009 STANDARDS©
WALNUT AND CHERRY: PLAIN SLICED, QUARTER CUT, ROTARY CUT (From Table 3.5 ©)
Natural Characteristics A Grade B Grade C Grade
Small Conspicuous Burls & Pin Knots — Comb. Avg. Number 24 per 4 x 8' panel 64 per 4 x 8' panel No Limit
Conspicuous Burls, Max. Size 3/8" 1/2" No Limit
Conspicuous Pin Knots
Average Number
Max. Size: Dark Part
Max. Size: Total
1 per 2 sq ft
16 per 4 x 8' panel
1/8"
1/4"
1 per 1 sq ft
32 per 4 x 8' panel
1/8"
1/4"
No Limit
Scattered Sound and Repaired Knots
Comb. Average Number
Max. Size — Sound
Max. Size — Repaired
Avg. Number — Repaired
No
1 per 8 sq ft
4 per 4 x 8' panel
3/8"
1/8"
1 per 8 sq ft
1 per 4 sq ft
8 per 4 x 8' panel
1/2"
1/2"
1 per 8 sq ft
Mineral Streaks Slight Yes Yes
Bark Pockets No Few to 1/8" x 1" Few to 1/4" x 2"
Worm Tracks No Slight Few
Vine Marks Occasional Yes Yes
Cross Bars Occasional Yes Yes
Gum Spots
Occasional gum spots
in Cherry
Gum spots and gum
streaks in Cherry
Gum spots and gum
streaks in Cherry
HICKORY: ROTARY-CUT, QUARTER CUT, PLAIN SLICED (From Table 3.4 ©)
Natural Characteristics A Grade B Grade Rustic
Small Conspicuous Burls & Pin Knots — Comb. Avg. Number 64 per 4 x 8' panel No Limit
As agreed
upon between
buyer and seller
Conspicuous Burls — Max. Size 3/8" 1/2"
Conspicuous Pin Knots
Average Number
Max. Size: Dark Part
Max. Size: Total
2 per 1 sq ft
64 per 4 x 8' panel
1/8"
1/4"
No Limit
1/8"
1/4"
Scattered Sound and Repaired Knots
Comb. Average Number
Max. Size — Sound
Max. Size — Repaired
Avg. Number — Repaired
No
1 per 8 sq ft
4 per 4 x 8' panel
3/8"
1/8"
1 per 8 sq ft
Mineral Streaks Slight Yes
Bark Pockets Small, Occasional Few to 1/4" x 2"
Worm Tracks Slight Few
Vine Marks Occasional Yes
Cross Bars Occasional Yes
Bird Peck Slight Yes
Knife Marks Knife marks may occur in these high density species