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NO. 2 GRADE – STRUCTURAL

Characteristics permitted and limiting provisions shall be:

Checks - seasoning checks not limited. Through checks at ends are limited as splits.

Knots - well spaced knots of any quality are permitted in the following sizes or their equivalent displacement:

Nom. Width At Edge
Wide
Face
Centerline
Wide
Face
Holes
(any
cause)
2" 5/8" 5/8" 5/8"
3" 7/8" 7/8" 7/8"
4" 1 1/4" 2"` 1 1/4"
5" 1 5/8" 2 3/8" 1 3/8"
6" 1 7/8" 2 7/8" 1 1/2"
8" 2 1/2" 3 1/2" 2"
10" 3 1/4" 4 1/4" 2 1/2"
12" 3 3/4" 4 3/4" 3"

Manufacture - Standard “F” Manuacture admits: very heavy torn grain; raised grain; very heavy loosened grain; heavy machine bite; machine gouge; heavy machine offset; chip marks; knife marks; medium wavy dressing; medium mismatch.

Pitch & Pitch Streaks
- not limited.

Pockets - pitch or bark, not limited.

 

Shake - if through at ends, limited as splits. Away from ends through shakes up to 2’ long, well separated. If not through, singe shakes shall not exceed 3’ long or 1/4 the length, whichever is greater.

Skips - hit and miss, with a maximum of 5% of the pieces containing hit or miss or heavy skip 2’ or less in length.

Slope of Grain - 1 in 8.

Splits- equal in length to 1½ the width of the piece

Stain - stained sapwood. Firm heart stain or firm red heart not limited.

Unsound Wood - (excluding white specks) Not permitted in thicknesses over 2”. In 2” lumber, small spots or streaks of firm honeycomb or peck are limited to 1/6 the width. Any other Unsound Wood is limited to spot 1/12 the width and 2” in length or equivalent smaller.

Wane - 1/3 the thickness and 1/3 the width full length, or equivalent on each face, provided that wane not exceed 2/3 the thickness or 1/2 the width for up to 1/4 the length.

Warp - light.

White Speck & Honey Comb - firm, 1/3 the face or equivalent.

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