6904 - Ceramic building bricks, flooring blocks, support or filler tiles and the like:

HTS code 6904 encompasses ceramic products primarily intended for construction and structural applications. This category specifically includes ceramic building bricks, which are used for walls and other masonry structures, as well as flooring blocks and support or filler tiles. These items are characterized by their fired clay composition and their functional role in buildings and other construction projects.

Distinguishing 6904 from its sibling categories at the root level is crucial for accurate classification. While other initial chapters (e.g., Chapters 1-20) cover a diverse range of raw materials and finished goods such as live animals, dairy products, or vegetable preparations, Chapter 69, and specifically 6904, focuses on manufactured ceramic articles. Unlike categories that might cover unworked stone or cement (which fall under Section XIII but in different chapters), 6904 is reserved for the finished ceramic building components themselves.

Within HTS code 6904, two primary subcategories exist to provide further specificity. 6904.10.00 classifies "Building bricks," clearly defining a major product within this group. The residual "Other" category, 6904.90.00.00, is for all other ceramic products fitting the general description of 6904 but not specifically falling under building bricks, such as certain types of flooring blocks or support and filler tiles used in construction. This subdivision allows for detailed tracking of these essential building materials.