Borate-Treated Walnut Cribbing Timbers from Japan
Rough walnut timbers diffusion-treated with borates for temporary mine shaft cribbing and construction shoring. Classified HTS 4403.12.0060 as nonconiferous other preserved rough wood. Provides insect resistance without heavy chemical impregnation.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
Import Tips
• Provide MSHA certification for underground mine applications
• Specify load-bearing capacity testing for structural applications
• Document diffusion treatment process differentiating from surface applications