Autoclaved Aerated Concrete (AAC) Blocks from Japan
AAC blocks are lightweight, precast concrete with air-entraining agents, steam-cured for insulation and fire resistance in modern buildings. HTS 6810.11.00 covers these as concrete building blocks.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Certify AAC production process (autoclaving) to differentiate from standard concrete
• Check for moisture content limits during import to prevent damage claims
• Document thermal conductivity for energy code compliance in destination markets