| Naics index | Naics index description |
|---|---|
| 321113 | Timbers, made from logs or bolts |
| 321113 | Wood chips made in sawmills |
| 321114 | Millwork, treating |
| 321114 | Mine props, treating |
| 321114 | Bridge and trestle parts, wood, treating |
| 321114 | Creosoting of wood |
| 321114 | Crossties, treating |
| 321114 | Flooring, wood block, treating |
| 321114 | Mine ties, wood, treated, manufacturing |
| 321114 | Pilings, foundation and marine construction, treating |