HTS heading 7308 · Chapter 73
HTS 7308: Structures and parts of structures of iron or steel
HTS heading 7308 covers structures (excluding prefabricated buildings of heading 9406) and parts of structures (for example, bridges and bridge sections, lock gates, towers, lattice masts, roofs, roofing frameworks, doors and windows and their frames and thresholds for doors, shutters, balustrades, pillars and columns) of iron or steel; plates, rods, angles, shapes, sections, tubes and the like, prepared for use in structures, of iron or steel. It has 10 tariff lines with a duty rate; the general (MFN) rates are Free (10 lines).
Imports may also owe Chapter 99 tariffs (Section 232, 301 or 201) depending on origin and date, plus the Merchandise Processing Fee and, by sea, the Harbor Maintenance Fee.
Rates from the 2026 HTS Revision 22, effective October 30, 2026. Source: U.S. International Trade Commission.
Tariff lines and duty rates
| HTS code | Description | General | Special | Column 2 | Estimate |
|---|---|---|---|---|---|
| 7308.10.00.00 | Bridges and bridge sections[kg] | Free | 45% | Estimate → | |
| 7308.20.00 | Towers and lattice masts | Free | 45% | ||
| 7308.20.00.30 | Tubular, whether or not tapered, and sectional components thereof[kg] | Estimate → | |||
| 7308.20.00.35 | Tubular wind turbine towers, whether or not tapered, and sectional components thereof[kg] | Estimate → | |||
| 7308.20.00.90 | Other[kg] | Estimate → | |||
| 7308.30 | Doors, windows and their frames and thresholds for doors: | ||||
| 7308.30.10.00 | Of stainless steel[kg] | Free | 35% | Estimate → | |
| 7308.30.50 | Other | Free | 25% | ||
| 7308.30.50.15 | Windows and their frames[kg] | Estimate → | |||
| 7308.30.50.25 | Thresholds for doors[kg] | Estimate → | |||
| 7308.30.50.50 | Other[kg] | Estimate → | |||
| 7308.40.00.00 | Equipment for scaffolding, shuttering, propping or pit- propping[kg] | Free | 45% | Estimate → | |
| 7308.90 | Other: | ||||
| Columns, pillars, posts, beams, girders and similar structural units: | |||||
| 7308.90.30.00 | Not in part of alloy steel[kg] | Free | 20% | Estimate → | |
| 7308.90.60.00 | Other[kg] | Free | 30% | Estimate → | |
| Other: | |||||
| 7308.90.70.00 | Steel grating[kg] | Free | 45% | Estimate → | |
| 7308.90.95 | Other | Free | 45% | ||
| 7308.90.95.30 | Sheet-metal roofing, siding, flooring and roof drainage equipment[kg] | Estimate → | |||
| Other: | |||||
| 7308.90.95.60 | Architectural and ornamental work[kg] | Estimate → | |||
| 7308.90.95.90 | Other[kg] | Estimate → | |||
| 7309.00.00 | Reservoirs, tanks, vats and similar containers for any material (other than compressed or liquefied gas), of iron or steel, of a capacity exceeding 300 liters, whether or not lined or heat insulated, but not fitted with mechanical or thermal equipment | Free | 45% | ||
| 7309.00.00.30 | Tanks[No., kg] | Estimate → | |||
| 7309.00.00.90 | Other[No., kg] | Estimate → |
21 lines shown. Statistical suffixes (the last two digits) inherit the rate of the 8-digit subheading above them.
Example: base duty and fees on $10000
For HTS 7308.10.00.00 at the general rate of Free, shipped by ocean, before any Chapter 99 tariffs:
| Base duty (Free) | $0.00 |
| Merchandise Processing Fee (0.3464%, min $34.58) | $34.64 |
| Harbor Maintenance Fee (0.125%) | $12.50 |
| Duty and fees | $47.14 |
Origin-specific tariffs can multiply this. Run this example from China or from Mexico to see every line.