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

Every line of heading 7308

• 7308 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.
• 7308.10.00.00 Bridges and bridge sections (under: 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) (kg): General Free; Special none; Column 2 45%.
• 7308.20.00 Towers and lattice masts (under: 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): General Free; Special none; Column 2 45%.
• 7308.20.00.30 Tubular, whether or not tapered, and sectional components thereof (kg).
• 7308.20.00.35 Tubular wind turbine towers, whether or not tapered, and sectional components thereof (kg).
• 7308.20.00.90 Other (under: Towers and lattice masts) (kg).
• 7308.30 Doors, windows and their frames and thresholds for doors.
• 7308.30.10.00 Of stainless steel (under: Doors, windows and their frames and thresholds for doors) (kg): General Free; Special none; Column 2 35%.
• 7308.30.50 Other (under: Doors, windows and their frames and thresholds for doors): General Free; Special none; Column 2 25%.
• 7308.30.50.15 Windows and their frames (under: Other) (kg).
• 7308.30.50.25 Thresholds for doors (under: Other) (kg).
• 7308.30.50.50 Other (under: Other) (kg).
• 7308.40.00.00 Equipment for scaffolding, shuttering, propping or pit- propping (kg): General Free; Special none; Column 2 45%.
• 7308.90 Other (under: 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).
• 7308.90.30.00 Not in part of alloy steel (under: Columns, pillars, posts, beams, girders and similar structural units) (kg): General Free; Special none; Column 2 20%.
• 7308.90.60.00 Other (under: Columns, pillars, posts, beams, girders and similar structural units) (kg): General Free; Special none; Column 2 30%.
• 7308.90.70.00 Steel grating (under: Other) (kg): General Free; Special none; Column 2 45%.
• 7308.90.95 Other (under: Other): General Free; Special none; Column 2 45%.
• 7308.90.95.30 Sheet-metal roofing, siding, flooring and roof drainage equipment (kg).
• 7308.90.95.60 Architectural and ornamental work (kg).
• 7308.90.95.90 Other (under: Other) (kg).

From MFG Calcs data: Fabricated structural steel

U.S. imports of fabricated structural steel (heading 7308) came to $7.11B in 2025, with $1.48B in calculated duty: an effective duty of 20.8%, every duty included.

Effective duty in Sep 2026: 35.4%, against 26.0% in Sep 2025.

Largest sources in 2025: Mexico $1.57B at 7.7% effective duty; Canada $966M at 12.4% effective duty; Denmark $674M at 26.2% effective duty; China $666M at 57.9% effective duty; Germany $498M at 27.3% effective duty.

These are family totals from U.S. import statistics published through USITC DataWeb, not this heading's rate alone; effective duty is calculated duty as a share of customs value, an estimate, not a ruling.

• Fabricated structural steel: tariffs and imports
• Fabricated structural steel: landed cost by country
• Fabricated structural steel: reshoring outlook

About these rates

The rates are those printed in the 2026 HTS Revision 23, published by the U.S. International Trade Commission. A 10-digit statistical line takes the rates printed on the 8-digit line above it. Chapter 99 duties (Section 232, Section 301, IEEPA) depend on the product, the origin and the date, are charged on top, and are not included. A code here is a strong lead, not a ruling: confirm it with a customs broker or a CBP binding ruling.