Precast Concrete Tunnel Segments from Canada
Ring segments of reinforced concrete for tunnel lining in underground civil engineering projects like subways. Precision-cast with gasket grooves for watertight assembly, under HTS 6810.91.00.00. Essential for segmental tunnel boring machine construction.
Duty Rate — Canada → United States
10%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Provide hydrostatic pressure test results for water resistance claims
• Mark segments with sequential numbers for assembly sequence verification
• Ensure tolerances meet TBM specifications in technical data sheets