9406.20.00.00 - Modular building units, of steel

This HTS classification covers prefabricated building units constructed from steel. These modular units are designed for assembly into larger structures, encompassing a wide range of applications from residential housing and commercial buildings to industrial facilities. The key distinguishing feature is their primary construction material, steel, which provides structural integrity and durability.

It is important to distinguish HTS 9406.20.00.00 from its sibling category, 9406.10.00.00, which specifically covers prefabricated building units made of wood. While both are modular building components, the material of construction is the sole determinant for classification at this level. Additionally, the "Other" category (9406.90.01) is for prefabricated buildings not made of wood or steel.

As a leaf node, this category does not have further subcategories. Classification under this code is complete once it is determined that the prefabricated building units are made of steel and meet the general definition of prefabricated buildings. Examples include pre-engineered steel structures, modular steel components for housing, and pre-fabricated steel office units.