Analysis
HTS 4418.91.10 covers drilled or notched lumber studs under heading 4418 (builders' joinery and carpentry of wood, including cellular wood panels and assembled…).
Rates on the nearby lines range from duty-free to 8%. The costliest confusion would be with 4418.74.90 (other: other) at 8%, a difference of 8 points on the customs value.
There is no general-rate duty on this line, which puts it with roughly 61% of the 257 tariff lines in chapter 44 that are also free. Free here means free of the base duty only: origin-specific Chapter 99 duties such as Section 301 can still be owed.
Census statistics map these goods to NAICS 321113 (Sawmills), an industry of 2,691 US establishments employing 79,871 people, the industry a domestic producer of these goods reports under.
Every edition we compared, from Jan 2023 to Oct 2026 (Rev. 22), shows the same general rate of Free.
Neighbouring lines
| Line | Description | General rate |
|---|---|---|
| 4418.11.00 | Windows, French-windows and their frames: of tropical wood | 3.2% |
| 4418.19.00 | Windows, French-windows and their frames: other | 3.2% |
| 4418.21.40 | Of tropical wood: french doors | 4.8% |
| 4418.21.80 | Of tropical wood: other | 4.8% |
| 4418.29.40 | Other: french doors | 4.8% |
| 4418.29.80 | Other: other | 4.8% |
| 4418.30.01 | Posts and beams other than products of subheadings 4418.81 to 4418.89 | 3.2% |
| 4418.40.00 | Formwork (shuttering) for concrete constructional work | 3.2% |
| 4418.50.00 | Shingles and shakes | Free |
| 4418.73.10 | For mosaic floors: solid | Free |
| 4418.73.20 | Having a face ply more than 6 mm in thickness | Free |
| 4418.73.30 | Other: other | 8% |
| 4418.73.40 | Having a face ply more than 6 mm in thickness | 3.2% |
| 4418.73.60 | Of unidirectional bamboo | Free |
| 4418.73.70 | Other: other | 5% |
| 4418.73.90 | Of bamboo or with at least the top layer (wear layer) of bamboo: other | 3.2% |
| 4418.74.10 | Other, for mosaic floors: solid | Free |
| 4418.74.20 | Having a face ply more than 6 mm in thickness | Free |
| 4418.74.90 | Other: other | 8% |
| 4418.75.40 | Having a face ply more than 6 mm in thickness | 3.2% |
| 4418.75.70 | Other, multilayer: other | 5% |
| 4418.79.01 | Assembled flooring panels: other | 3.2% |
| 4418.81.00 | Glue-laminated timber (glulam) | 3.2% |
| 4418.82.00 | Cross-laminated timber (CLT or X-lam) | 3.2% |
| 4418.83.00 | Engineered structural timber products: i-beams | 3.2% |
| 4418.89.00 | Engineered structural timber products: other | 3.2% |
| 4418.91.91 | Of bamboo: other | 3.2% |
| 4418.92.00 | Cellular wood panels | 3.2% |
| 4418.99.10 | Drilled or notched lumber studs | Free |
| 4418.99.91 | Other: other | 3.2% |