HS Code for Structural timber

Structural timber, specifically engineered structural timber products other than glulam, CLT, or I-beams, is classified under HS code 4418.89. This classification falls within Chapter 44, which covers wood and articles of wood. Heading 4418 is dedicated to builders' joinery and carpentry of wood, including cellular wood panels and assembled flooring. In the 2022 update to the Harmonized System, new subheadings were introduced under 4418.8 to specifically track engineered structural timber products used in modern construction. While 4418.81 covers glue-laminated timber (glulam) and 4418.82 covers cross-laminated timber (CLT), the residual category 4418.89 captures other advanced engineered wood products. These products are characterized by being manufactured from layers or particles of wood bonded together with adhesives to create structural components that are often stronger and more stable than solid sawn timber. This classification is essential for distinguishing between traditional lumber and high-tech wood products used in load-bearing applications in building frames, roofs, and bridges.

Products Included

• Laminated Veneer Lumber (LVL)
• Parallel Strand Lumber (PSL)
• Laminated Strand Lumber (LSL)
• Engineered wood trusses (excluding I-beams)
• Structural composite lumber (SCL)

Common Misclassification

Structural timber is frequently misclassified under 4407, which is for wood sawn or chipped lengthwise (standard lumber). However, because engineered timber is a product of "builders' carpentry," it must be placed in 4418. It is also often confused with 4418.81 (glulam) or 4418.83 (I-beams); 4418.89 should only be used for engineered products that do not meet the specific definitions of those other subheadings.

FAQ

What is the HS code for Structural timber?

The HS code for engineered structural timber products (excluding glulam, CLT, and I-beams) is 4418.89.

Is solid oak beam classified here?

No, solid wood beams that have not been engineered or assembled via joinery are typically classified under 4407 or 4418.60, depending on the degree of processing.