U.S. exports of Modular Building Units of Steel (HS 940620) totaled $16.2M in August 2026.
Importers of Modular Building Units of Steel paid $1.3M in duties in August 2026, an average duty rate of 13.50% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Modular Building Units of Steel imports of $9.9M in August 2026 ran 20% above the year-to-date monthly average of $8.3M.
Last updated: August 2026 dataSteel modular building units — factory-assembled room modules, container-based structures, and steel-framed portable buildings — are classified under a single 10-digit line (9406200000) and are subject to Section 232 tariffs on steel articles, a cost factor that significantly affects landed pricing for this commodity. Mexico and Canada are the leading suppliers, and USMCA-qualifying goods may be eligible for relief from Section 232 measures under applicable quota or exclusion frameworks — importers should verify current status with a licensed customs broker. The heading serves construction, energy, mining, and military sectors where rapid deployment of standardized structures is a priority.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
414 import shipments a month
Steel modular building units of steel are subject to Section 232 tariffs, which apply broadly to steel articles. The effective cost impact depends on the country of origin and whether any product-specific exclusions or quota arrangements apply. Because Section 232 rates and exclusion availability change frequently, importers should confirm current status with a customs broker before finalizing sourcing decisions.
Modular building units under 940620 are self-contained, three-dimensional room or space modules designed to be stacked or connected on-site. Prefabricated steel buildings under 940690 typically consist of structural components — columns, beams, wall panels — that are assembled into a building on-site rather than arriving as finished room modules. The degree of factory completion and the three-dimensional versus flat-pack nature of the product are the key distinguishing factors.
ImportsExports
Imports
$9.9MYoY · free account
Exports
$16.2MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $87.4M of Modular Building Units of Steel and exported $84.6M.
Through August 2026. Source: U.S. Census Bureau.
Exports · August 2026
destination
Portugal and Dominican Republic together take 87% of it.
customs district
origin
entry
rate provision · imports
27.8% enters free of duty; duty collected equals 13.50% of imports for consumption.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 9406200000 | Modular Building Units, of Steel | $9.9M | 13.50% | 72.25% | $1.3M |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 9406200000 | Modular Building Units, of Steel | $16.2M |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
Subheading 2 of 3 in heading 9406
Subheading 940620 · $16.2M of $41.3M
Trade Directory
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