4410 - Particle board, oriented strand board (OSB) and similar board (for example, waferboard) of wood or other ligneous materials, whether or not agglomerated with resins or other organic binding substances:

This HTS category, 4410, encompasses engineered wood boards such as particle board, oriented strand board (OSB), and similar products like waferboard. These materials are manufactured from wood or other ligneous (woody) materials, which are then agglomerated or bound together using resins or other organic binding substances. The key characteristic is the engineered nature of the board, differentiating it from solid lumber or plywood.

When classifying within Section IX and Chapter 44, which deals with wood and articles of wood, it's crucial to distinguish 4410 from other wood-based products. For instance, solid wood panels or lumber would fall under different headings, while veneers or plywood with distinct structural arrangements would also be classified separately. The process of comminuting wood particles, strands, or wafers and then binding them under pressure is central to the definition of this category.

Within Heading 4410, further subdivision occurs to distinguish between specific types of these engineered boards. The primary distinction is often between boards specifically identified (though not explicitly listed in the provided snippet, this is typical for HTS structure) and "Other" boards that meet the general definition but may not have a dedicated subheading. The subcategories allow for more granular classification based on the specific wood elements used and the manufacturing process, aiding in trade statistics and duty assessment.