Gneiss Railway Ballast from Mexico
Metamorphic gneiss crushed to AREMA #4 ballast specification for mainline railway track support. Provides excellent lateral stability under HTS 2517.10.00 railway ballast provision. Banded appearance from mineral layering.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Railway engineering certification linking to specific track projects strengthens classification
• Foliation plane analysis ensures proper crushing orientation for strength
• Avoid thin banding; weak lamination risks construction rejection