4418.99.91.20 - Roof trusses

This category specifically encompasses roof trusses constructed from wood. Roof trusses are pre-fabricated structural components designed to support a roof, typically comprising a triangular framework of beams. They are distinguished by their primary function in roof construction and their integrated, triangulated design for load distribution.

Roof trusses are differentiated from their sibling categories by their specific form and application. While other entries in 4418.99.91 might cover laminated arches, other fabricated structural wood members, or prefabricated partitions, this classification is exclusively for the distinct triangular framework of roof trusses. It does not include individual lumber components before assembly into a truss, nor does it encompass other finished building elements.

As this classification represents a leaf node in the HTS, there are no further subdivisions. Therefore, careful consideration of the definition and intended use of the wooden article is paramount for accurate classification. Goods that do not meet the specific definition of a roof truss, even if made of wood and used in building construction, would be classified elsewhere.