Pre-notched Fire-Rated Studs
2x6 Douglas fir lumber studs pre-notched for wiring with intumescent sealant channels for 1-hour fire-rated wall assemblies. HTS 4418.99.10.00 applies as these are drilled/notched specifically for builders' carpentry in fire-resistant construction. The notches maintain structural integrity while meeting code requirements.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If prior to notching, as untreated sawn wood
Base sawn lumber without fabrication falls under Chapter 44 coniferous/non-coniferous timber headings.
If beads/moldings are added to edges
Stud with decorative or functional edge profiles becomes profiled wooden beads or moldings.
If fiberboard construction rather than solid lumber
Similar notched studs made from wood fiberboard classify under Chapter 44 heading 4411 for density fiberboard.
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Import Tips & Compliance
• Obtain fire-rating test documentation from manufacturer for customs verification
• Ensure kiln-dried certification (KD19) for dimensional stability claims
• Avoid bundling with metal components to prevent set classification issues
Related Products under HTS 4418.99.10.00
Pre-drilled 2x4 Lumber Studs
Nominal 2x4 lumber studs (38mm x 89mm x 92.5 inches) with pre-drilled holes for electrical wiring and plumbing conduits, designed specifically for residential framing. Classified under HTS 4418.99.10.00 as drilled lumber studs used in builders' joinery and carpentry. The drilling facilitates faster installation in standard wall framing applications.
Notched Spruce Lumber Studs
S-P-F spruce-pine-fir studs with factory-notched channels for HVAC ducting and piping runs, standard 16-inch on-center spacing preparation. Falls under HTS 4418.99.10.00 due to the notching that qualifies as specialized carpentry for construction joinery. Ideal for multi-trade installations in commercial framing.
Drilled Metal-Plated Studs
Engineered wood studs with pre-drilled holes and steel reinforcement plates at notches for seismic zones. Classified HTS 4418.99.10.00 for the drilled/notched lumber component in builders' joinery, excluding the metal classification per Chapter 44 notes. Used in high-wind and earthquake-prone regions.
Notched Utility Wall Studs
92-5/8 inch pre-cut Hem-Fir studs with double notches for top and bottom plates plus wiring chases. HTS 4418.99.10.00 for notched lumber studs purpose-built for modular wall framing in tract housing. Speeds construction by eliminating field modifications.
Pre-drilled Acoustic Studs
Resilient channel pre-drilled 2x4 studs for sound-rated partition walls with staggered notch patterns. Under HTS 4418.99.10.00 as drilled lumber studs for specialized carpentry in commercial interiors. Reduces sound transmission between spaces.
Notched Hurricane Studs
Engineered southern yellow pine studs with reinforced notches and pre-drilled tie-down points for hurricane-resistant framing. HTS 4418.99.10.00 captures the drilled/notched features for high-velocity wind zone builders' joinery. Meets stringent coastal building codes.