Tariff monitor · Metals & Mill Products
Fabricated structural steel: statutory & effective tariff rates
Statutory HTS duty rates for 9 fabricated structural steel tariff lines (MFN Free), from USITC. Effective rate May 2026: 37.15%; monthly history since 2014.
Statutory rates from the schedule
- Fabricated structures and parts — frames, towers, columns, and prefab structural assemblies. This family covers HTS heading 7308: 9 eight-digit rate lines with MFN (column 1, general) rates of Free in the 2026 schedule.
- Chapter 99 flags on individual lines mark Section 301/232 overlay provisions (e.g. 9903.88.02) that apply on top of the MFN column.
What importers actually paid
- Latest month on record (2026-05): 37.15% effective on $480.5M of imports, versus 20.77% in the same month a year earlier. The monthly archive holds 149 observations from 2014-01 through 2026-05.
- In 2025, U.S. imports for consumption in this family totaled $7.1B in customs value and paid $1.5B in calculated duties: an effective tariff rate of 20.77%. The effective rate captures Section 301/232 overlays, exclusions, and special-program use that the statutory column cannot.
- A year earlier the effective rate was 2.22%, so the duty burden rose 18.6 points.
- Top source countries in 2025: Mexico ($1.6B at 7.7%), Canada ($966.1M at 12.42%), Denmark ($674.2M at 26.18%), China ($666.1M at 57.86%), Germany ($497.6M at 27.27%).
Representative rate lines
- 7308.10.00.00: Bridges and bridge sections — MFN Free
- 7308.20.00: Towers and lattice masts — MFN Free
- 7308.30.10.00: Of stainless steel — MFN Free
- 7308.30.50: Other — MFN Free
- 7308.40.00.00: Equipment for scaffolding, shuttering, propping or pit- propping — MFN Free
- 7308.90.30.00: Not in part of alloy steel — MFN Free
- 7308.90.60.00: Other — MFN Free
- 7308.90.70.00: Steel grating — MFN Free
About this data
- Reference statistics derived from USITC published data. Not a customs ruling; verify rates with a licensed customs broker before relying on them.
Last reviewed 2026-05-12.