| 4406 | | Railway or tramway sleepers (cross-ties) of wood: | | | | |
| 4406.10.00 | 00 | Not impregnated | m3 No. | Free | | Free |
| 4406.90.00 | 00 | Other | m3 No. | Free | | Free |
| 4407 | | Wood sawn or chipped lengthwise, sliced or peeled, whether or not planed, sanded or end-jointed, of a thickness exceeding 6 mm: | | | | |
| 4407.10.01 | | Coniferous | | Free | | $1.70/m3 |
| 4407.10.01 | 01 | Finger-jointed | m3 | | | |
| 4407.10.01 | 02 | Other: | | | | |
| 4407.10.01 | 02 | Treated with paint, stain, creosote, or other preservative | m3 | | | |
| 4407.10.01 | 15 | Not treated: | | | | |
| 4407.10.01 | 15 | Mixtures of spruce, pine, and fir ("S-P-F") | m3 | | | |
| 4407.10.01 | 16 | Mixtures of western hemlock and amabilis fir ("hem-fir") | m3 | | | |
| 4407.10.01 | 17 | Other: | | | | |
| 4407.10.01 | 17 | Sitka spruce (Picea sitchensis): | | | | |
| 4407.10.01 | 42 | Eastern white pine (Pinus Strobus) and red pine (Pinus resinosa): | | | | |
| 4407.10.01 | 42 | Rough | m3 | | | |
| 4407.10.01 | 43 | Other | m3 | | | |
| 4407.10.01 | 44 | Lodgepole pine (Pinus contorta): | | | | |
| 4407.10.01 | 44 | Rough | m3 | | | |
| 4407.10.01 | 45 | Other | m3 | | | |
| 4407.10.01 | 46 | Southern yellow pine (Loblolly pine (Pinus taeda)), long leaf pine (Pinus palustris), pitch pine (Pinus rigida), short leaf pine (Pinus echinata), slash pine (Pinus elliottii) and Virginia pine (Pinus virginiana): | | | | |
| 4407.10.01 | 46 | Rough | m3 | | | |
| 4407.10.01 | 47 | Other | m3 | | | |
| 4407.10.01 | 48 | Ponderosa pine (Pinus ponderosa): | | | | |
| 4407.10.01 | 48 | Rough | m3 | | | |
| 4407.10.01 | 49 | Other | m3 | | | |
