Download:Ansi Face And Back Grade
Face Grades A Grade B Grade C Grade D Grade
Birch, Ash, Maple and Poplar: Rotary-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"

Face Grades A Grade B Grade C Grade
Red and White Oak: Rotary-Cut, Quarter-Cut, Plain-Sliced    
Pin Knots and Small Burls, Comb. Avg. ANSI 12- 10 to 1/4" 24- 16 to 1/4" No Limit
Sound and Repaired Knots in Comb ANSI No 4 8
Repaired Knots ANSI No 4 to 1/8" 4 to 1/2"
Mineral Streaks ANSI Slight Few to 8" Yes to 12"
Sap ANSI 5% Up to 20% Yes
Blended Repaired Tapering Hairline Splits ANSI Two 1/16" x 6" Four 1/8" x 8" Four 3/16" x 8"

Back Grades   1 Back 2 Back 3 Back 4 Back

Sound Tight Knots

ANSI 16 to 3/8" 16 to 3/4" Max 16 1/2"-1 1/2 Yes

Knotholes

ANSI No All Repaired All 3/8" 10 to 1 Up to 4"

Repaired Knots

ANSI No 8 to 1/2" Not No

Sound Tight Burls

ANSI Yes Yes Yes Yes

Mineral/Sap

ANSI Yes/Yes Yes/Yes Yes/Yes Yes/Yes

Rough Cut

ANSI Two 8" Dia. Areas Yes Yes Yes
Joints or Splits ANSI Six 1/8" x 12" Rep’rd Six 3/16" x 12” Rep’rd 3/8" x 1/4" LOP 1" to 1/4 LOP, 1/2" to 1/2 LOP, 1/4" to Full LOP