| PROPERTIES OF STRUCTURAL LUMBER- Sectional Properties of Standard Dressed (S4S) Lumber Sizes | ||||
| Nominal
Size (b x d), inches |
Standard Dressed Size (b x d), inches | Area of Section, A ( sq. inches) | Moment of Inertia, I (inch^4) | Section
Modulus, S (inch^3) |
| 2x4 | 1.5x3.5 | 5.25 | 5.359 | 3.063 |
| 2x6 | 1.5x5.5 | 8.25 | 20.797 | 7.563 |
| 2x8 | 1.5x7.25 | 10.875 | 47.635 | 13.141 |
| 2x10 | 1.5x9.25 | 13.875 | 98.932 | 21.391 |
| 2x12 | 1.5x11.25 | 16.875 | 177.979 | 31.641 |
| 2x14 | 1.5x13.25 | 19.875 | 290.775 | 43.891 |
| 3x4 | 2.5x3.5 | 8.75 | 8.932 | 5.104 |
| 3x6 | 2.5x5.5 | 13.75 | 34.661 | 12.604 |
| 3x8 | 2.5x7.25 | 18.125 | 79.391 | 21.901 |
| 3x10 | 2.5x9.25 | 23.125 | 164.886 | 35.651 |
| 3x12 | 2.5x11.25 | 28.125 | 296.631 | 52.734 |
| 4x4 | 3.5x3.5 | 12.25 | 12.505 | 7.146 |
| 4x6 | 3.5x5.5 | 19.25 | 48.526 | 17.646 |
| 4x8 | 3.5x7.25 | 25.375 | 111.148 | 30.661 |
| 4x10 | 3.5x9.25 | 32.375 | 230.840 | 49.911 |
| 4x12 | 3.5x11.25 | 39.375 | 415.283 | 73.828 |
| 4x14 | 3.5x13.5 | 47.25 | 717.609 | 106.313 |
| 6x4 | 5.5x3.5 | 19.25 | 19.651 | 11.229 |
| 6x6 | 5.5x5.5 | 30.25 | 76.255 | 27.729 |
| 6x8 | 5.5x7.5 | 41.25 | 193.359 | 51.563 |
| 6x10 | 5.5x9.5 | 52.25 | 392.963 | 82.729 |
| 6x12 | 5.5x11.5 | 63.25 | 697.068 | 121.229 |
| 6x14 | 5.5x13.5 | 74.25 | 1127.672 | 167.063 |
| 6x18 | 5.5x17.5 | 96.25 | 2456.380 | 280.729 |
| 8x4 | 7.25x3.5 | 25.375 | 25.904 | 14.802 |
| 8x6 | 7.5x5.5 | 41.25 | 103.984 | 37.813 |
| 8x8 | 7.5x7.5 | 56.25 | 263.672 | 79.313 |
| 8x10 | 7.5x9.5 | 71.25 | 535.859 | 112.813 |
| 8x12 | 7.5x11.5 | 86.25 | 950.547 | 165.313 |
| 8x14 | 7.5x13.5 | 101.25 | 1537.734 | 227.813 |
| Nominal Size (b x d), inches |
Standard Dressed Size (b x d), inches | Area of Section, A ( sq. inches) | Moment of Inertia, I (inch^4) | Section Modulus, S (inch^3) |