Board Classification S2S - Surfaced 2 Sides - These boards have been surface planed on top and bottom S2S1E - Surfaced 2 Sides One Edge S3S - Surfaced 3 Sides - These boards have been one edge surface planed on top/bottom and straight line ripped on one edge. S4S - Smooth 4 Sides - These boards have been planed and sanded on all 4 sides to their finished dimensions and are usually sold by the linear foot. FAS - Firsts and Seconds. Generally clear of large knots, FAS boards may be Rough cut, S2S, or S3S. Rough - Not surfaced on any side Board Dimensioning Boards are listed in most cases by their nominal dimensions. Actual sizes for S4S finished lumber should be as follows: |
1 x 2 |
3/4" x 1-1/2" |
2 x 2 |
1-1/2" x 1-1/2" |
|---|---|---|---|
1 x 3 |
3/4" x 2-1/2" |
2 x 3 |
1-1/2" x 2-1/2" |
1 x 4 |
3/4" x 3-1/2" |
2 x 4 |
1-1/2" x 3-1/2" |
1 x 6 |
3/4" x 5-1/2" |
2 x 6 |
1-1/2" x 5-1/2" |
1 x 8 |
3/4" x 7-1/4" |
2 x 8 |
1-1/2" x 7-1/4" |
1 x 10 |
3/4" x 9-1/4"** |
2 x 10 |
1-1/2" x 9-1/4"** |
1 x 12 |
3/4" x 11-1/4"** |
2 x 12 |
1-1/2" x 11-1/4"** |
** Has been known to vary |
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