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