| Product |
*Industrial Lumber: 2" and thicker, 2" and wider
See SPIB Special Product Rules for design values
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Grade
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Grade Characteristics and Typical Uses
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Industrial 86
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Appearance is same as B&B Finish for thicknesses of 4" and less and widths 12" and less. Larger sizes conform to Dense Structural 86 Structural Lumber except for dense grain requirement. |
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Industrial 72
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Appearance is same as C Finish for thicknesses of 4" and less and widths 12" and less. Larger sizes conform to Dense Structural 72 Structural Lumber except for dense grain requirement.
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Industrial 65
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Appearance is same as D Finish for thicknesses 4" and less and widths 12" and less. Larger sizes conform to Dense Structural 65 Structural Lumber except for dense grain requirement.
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*Structural Lumber: 2" and thicker, 2" and wider
See SPIB Special Product Rules for design values
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Grade
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Grade Characteristics and Typical Uses
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Dense Structural 86
Dense Structural 72
Dense Structural 65
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Premier structural grades. Provides good appearance with some of the highest design values available in any softwood species.
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Radius Edge Decking: 1-1/4" thick, 4" to 6" wide
See SPIB Special Product Rules for recommended spans
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Grade
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Grade Characteristics and Typical Uses
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Premium
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High-quality product, recommended where smallest knots are desired and appearance is of utmost importance. Excellent for painting or staining.
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Standard
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Slightly less restrictive than premium grade. A very good product to use where a more rustic appearance is desired. Excellent for painting or staining.
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Finish: 3/8" to 4" thick, 2" and wider
Design values are not assigned
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Grade
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Grade Characteristics and Typical Uses
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*B&B
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Highest recognized grade of finish. Generally clear, although a limited number of pin knots are permitted. Finest quality for natural or stain finish.
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C
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Excellent for painting or natural finish where requirements are less exacting. Reasonably clear, but permits limited number of surface checks and small tight knots.
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C&Btr
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Combination for B&B and C grades; satisfies requirements for high-quality finish.
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D
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Economical, serviceable grade for natural or painted finish.
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Flooring, Drop Siding, Paneling, Ceiling and Partition, OG Batts, Bevel Siding,
Miscellaneous Millwork
Design values are not assigned
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Grade
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Grade Characteristics and Typical Uses
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*B&B, C
C&Btr, D
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See Finish grades for face side; reverse side wane limitations are lower.
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No.1
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No.1 Flooring and Paneling not provided under SPIB Grading Rules as a separate grade, but if specified, will be designated and graded as D; No.1 Drop Siding is graded as No.1 Boards.
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No.2 |
Graded as No.2 Boards. High utility value where appearance is not a factor.
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No.3 |
Suitable for economical use as sheathing or lathing.
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*Shop and Moulding
Design values are not assigned
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Grade
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Grade Characteristics and Typical Uses
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No.1
No.2
No.3
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Recommended for moulding and millwork applications.
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* Most mills do not manufacture all products and make all grade separations. Those products and grades not manufactured by most mills are noted with an asterisk.
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