Domestic Plywood Grade Rules Quality Assurance and Inspection Grading

Face Grades
A Grade
B Grade
C Grade
D Grade
Birch, Ash, Maple and Poplar: Rotary-Cut, Quarter-Cut, Plain-Sliced
Pin Knots and Small Burls, Comb. Avg.
ANSI
10- 4 to 1/4″
16- 8 to 1/4″
No Limit
No Limit
Conspicuous Burls, Max.
ANSI
3/8″
1/2″
No Limit
No Limit
Sound and Repaired Knots in Comb
ANSI
No
4
8
10
Repaired Knots
ANSI
No
4 to 1/8″
4 to 1/2″
5 to 3/4″
Mineral Streaks
ANSI
Slight
Slight
Yes
Yes
Vine
ANSI
Slight
Yes
Yes
Yes
Rough Cut
ANSI
No
Slight
Two 8″ Areas
5% of Panel
Blended Repaired Tapering Hairline Splits
ANSI
Two 1/16″ x 6″
Four 1/8″ x 8″
Four 3/16″ x 8″
Six 1/4″ x 10″
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