No. 2 And Better
No. 2 and Better is intended primarily for use in housing and light construction where it is exposed, such as paneling, shelving, and other uses where a knotty type of lumber with fine appearance is required. Since knots can be easily sealed for painting, this is also an excellent grade for siding, cornice soffits, fascia, and other exterior uses.
No. 3 Common
No. 3 Common is widely used for a large range of building purposes where appearance and strength are both important. With characteristics limited to assure a high degree of serviceability, this grade is often used for shelving, paneling, siding, and is especially suited for fences, boxes, crating, sheathing, and many industrial applications.
No. 4 Common
No. 4 Common is more widely used than other grades for general construction purposes, such as sub-floors, roof and wall sheathing, concrete forms, low cost fencing, crating, and general use construction. It is a popular grade in general construction and industrial use. Although appearance is given consideration, pieces are graded chiefly for serviceability as they are seldom used for exposed construction.
5/4 & 6/4 Moulding
5/4 and 6/4 RWL Moulding Stock is stock of a type suitable for ripping into strips 1" and wider, 10' and longer. At least 2/3 of the area contains such rips of the grade permissible in standard mouldings. In 5/4, 6/4, and 7/4 moulding stock, the grade of each rip is determined from the poorest face. Wane, stain, skips in dressing or other characteristics that will surface off in making mouldings of standard size are permitted in computing the percentage of rips. Up to 10% of the footage of any item may be 6' to 9', provided each piece contains 2 or more full-length moulding rips.
5/4 & 6/4 No.2
In 5/4 and 6/4 RWL No. 2 Shop, each piece contains not less than one of the following percentages of door cuttings: 25% No. 1 Cuttings; or 33.33% mixed No.1 and No. 2 Cuttings; or 40% No. 2 Cuttings.
5/4 & 6/4 No.3
5/4 and 6/4 RWL No. 3 Shop permits any piece below the grade of No. 2 Shop that contains not less than 30% of the area in any combination of the following cuttings: No. 1 and No. 2 door cuttings; or No. 1 quality sash cuttings; or moulding rips 2" and wider and 10' and longer; or jamb and sill cuttings 5" and wider and 3' and longer which are of No. 1 cutting quality on one face except that barely perceptible light brown stain is permitted. The backs of jamb and sill cuttings may contain pin knots, seasoning checks, medium pitch pockets, light stain, medium pitch, skips in dressing, and other characteristics of equivalent nature. Not more than 5% of stock narrower than 5" is admissible in any shipment of No. 3 Shop.
5/4 & 6/4 Shop Outs
5/4 and 6/4 RWL Shop Outs contain paragraph 99 defects as applicable.