Solid Concrete Masonry Units (CMU)
Solid CMUs are dense concrete blocks without voids, molded from cement mixtures for high-strength foundation and retaining walls. Classified under HTS 6810.11.00 for their role as standard building bricks and blocks in construction.
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More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If prefabricated into larger panels or slabs
Prefabricated structural concrete articles beyond simple blocks go to 6810.91.
If made from worked natural stone like granite
Natural stone blocks are in heading 6802, excluding artificial cement-based products.
If containing asbestos fibers for special applications
Asbestos-cement articles are separately classified in 6811.40, not plain concrete.
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Import Tips & Compliance
• Provide test reports for minimum density (over 75% solid) to confirm classification as solid units
• Label shipments clearly as 'concrete building blocks' to prevent confusion with decorative tiles
Related Products under HTS 6810.11.00
Concrete Hollow Building Blocks
These are precast hollow blocks made from Portland cement, aggregates, and water, used primarily for constructing walls in residential and commercial buildings. They fall under HTS 6810.11.00 as building blocks of concrete, designed for load-bearing and non-load-bearing masonry applications.
Lightweight Concrete Building Bricks
Lightweight bricks produced with expanded clay aggregates or foam in a cement matrix, ideal for partition walls due to reduced weight. They qualify under HTS 6810.11.00 as concrete bricks for building purposes.
Autoclaved Aerated Concrete (AAC) Blocks
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.
Cement Sandwich Building Blocks
Sandwich blocks with a concrete core and insulating foam layers bonded by cement, used for energy-efficient walls. Classified in HTS 6810.11.00 as composite concrete building blocks.
Vibrated Concrete Paver Bricks
Dense, vibrated concrete bricks for pedestrian pavements and driveways, with textured surfaces for grip. Under HTS 6810.11.00 when used as building bricks rather than decorative tiles.
High-Strength Concrete Curb Bricks
Heavy-duty concrete bricks for street curbs and gutters, molded with high cement ratios for durability. Fits HTS 6810.11.00 as specialized building bricks.