| Naics index | Naics index description |
|---|---|
| 321114 | Pilings, round wood, cutting and treating |
| 321114 | Pilings, wood, treating |
| 321114 | Poles, round wood, cutting and treating |
| 321114 | Poles, wood, treating |
| 321114 | Posts, round wood, cutting and treating |
| 321114 | Posts, wood, treating |
| 321114 | Preserving purchased wood and wood products |
| 321114 | Pressure treated lumber made from purchased lumber |
| 321114 | Railroad ties (i.e., bridge, cross, switch) treating |
| 321114 | Structural lumber and timber, treating |