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

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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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