Chapter 6810 — Customs Tariff Headings

Architectural Concrete Screen Blocks

Architectural concrete screen blocks are precast concrete units with decorative geometric openings, used for privacy screens and building facades. They are made from cement, aggregates, and water, and are not reinforced, qualifying them as building blocks of concrete under tariff item 6810.11.00.

Autoclaved Aerated Concrete (AAC) Blocks

Autoclaved aerated concrete (AAC) blocks are lightweight precast concrete units containing air voids, produced with cement, lime, sand, and an expanding agent, then steam-cured under pressure. They are used for wall construction and insulation, and meet the definition of building blocks of concrete under tariff item 6810.11.00.

Cement Sandwich Building Blocks

Cement sandwich building blocks consist of a concrete core with insulating foam layers bonded by cement, used for energy-efficient wall construction. They are composite concrete blocks, not reinforced, and are classifiable as building blocks under tariff item 6810.11.00.

Concrete Hollow Building Blocks

Concrete hollow building blocks are precast units made from Portland cement, aggregates, and water, with hollow cores to reduce weight and cost. They are used for constructing walls in residential and commercial buildings and are standard building blocks of concrete under tariff item 6810.11.00.

Eco-Friendly Recycled Aggregate Concrete Blocks

Eco-friendly recycled aggregate concrete blocks are made from cement and recycled construction waste aggregates, used for sustainable building. They are unreinforced concrete blocks, qualifying as building blocks under tariff item 6810.11.00.

High-Strength Concrete Curb Bricks

High-strength concrete curb bricks are heavy-duty concrete units molded with high cement ratios for use in street curbs and gutters. They are building bricks of concrete, not reinforced, and fall under tariff item 6810.11.00.

Insulated Concrete Form (ICF) Blocks

Insulated concrete form (ICF) blocks combine expanded polystyrene cores with concrete-receiving shells, designed to be filled with concrete on-site for wall construction. When imported as preformed concrete building blocks, they are classifiable under tariff item 6810.11.00.

Lightweight Concrete Building Bricks

Lightweight concrete building bricks are produced with expanded clay aggregates or foam in a cement matrix, making them ideal for partition walls due to reduced weight. They are unreinforced concrete bricks for building purposes, qualifying under tariff item 6810.11.00.

Perforated Concrete Breeze Blocks

Perforated concrete breeze blocks are decorative concrete blocks with perforations for ventilation and screening in architecture. They are unreinforced concrete building blocks, classifiable under tariff item 6810.11.00.

Precast Concrete Partition Bricks

Precast concrete partition bricks are precast units for interior non-load-bearing partitions, often with alignment holes for rods. They are unreinforced concrete building bricks, qualifying under tariff item 6810.11.00.

Reinforced Concrete Interlocking Blocks

Reinforced concrete interlocking blocks are interlocking blocks with embedded steel rebar for enhanced stability in seismic zones, made of vibrated concrete. They are primarily concrete building blocks, and despite the reinforcement, they fall under tariff item 6810.11.00 as building blocks.

Solid Concrete Masonry Units (CMU)

Solid concrete masonry units (CMUs) are dense concrete blocks without voids, molded from cement mixtures for high-strength foundation and retaining walls. They are standard building blocks of concrete, qualifying under tariff item 6810.11.00.

Split-Face Concrete Building Bricks

Split-face concrete building bricks are concrete bricks with a textured, stone-like split face for aesthetic masonry veneers. They are building bricks of concrete, not reinforced, and fall under tariff item 6810.11.00.

Standard 8x8x16 Concrete Blocks

Standard 8x8x16 concrete blocks are nominal 8-inch by 8-inch by 16-inch gray concrete blocks, the industry standard for masonry walls. They are unreinforced concrete building blocks, precisely falling under tariff item 6810.11.00.

Vibrated Concrete Paver Bricks

Vibrated concrete paver bricks are dense, vibrated concrete bricks for pedestrian pavements and driveways, with textured surfaces for grip. When used as building bricks rather than decorative tiles, they fall under tariff item 6810.11.00.

Basalt Agglomerate Mosaic Tiles

These mosaic tiles are agglomerated from basalt stone with polymer binders, forming sheets of small tiles for flooring accents. As they are made of natural stone agglomerated with a binder other than cement, they fall under tariff item 6810.19.00 for other articles of artificial stone.

Dolomite Resin Floor Tiles

These floor tiles are made from dolomite stone combined with resin binders, creating a durable surface for commercial spaces. The agglomeration of natural stone with a non-cement binder places them under tariff item 6810.19.00 as other articles of artificial stone.

Engineered Marble Floor Tiles

These floor tiles are produced by agglomerating crushed marble with resin binders, resulting in a polished, durable surface for residential and commercial use. The use of resin rather than cement as a binder classifies them under tariff item 6810.19.00 for other articles of artificial stone.

Engineered Quartz Wall Mosaic

These mosaic sheets consist of engineered quartz agglomerated with resin, designed for decorative wall applications. The resin binder and quartz aggregate make them articles of artificial stone under tariff item 6810.19.00.

Granite Composite Porcelain Tiles

These tiles blend crushed granite with resin binders to create a durable surface with a natural stone appearance for high-traffic areas. The agglomeration with a non-cement binder classifies them under tariff item 6810.19.00 as other articles of artificial stone.

Limestone Resin Floor Tiles

These floor tiles are made from limestone powder agglomerated with resin, offering an affordable tumbled natural look. The resin binder and limestone aggregate place them under tariff item 6810.19.00 for other articles of artificial stone.

Onyx Resin-Bound Wall Tiles

These decorative wall tiles are made from onyx stone aggregates bound with translucent resin, suitable for backlit feature walls. The resin binder and stone aggregate classify them under tariff item 6810.19.00 as other articles of artificial stone.

pebble Stone Polymer Tiles

These outdoor patio tiles are made from pebble stones agglomerated with polymer binders, providing a durable surface for exterior use. The polymer binder and stone aggregate place them under tariff item 6810.19.00 for other articles of artificial stone.

Quartz Resin Wall Tiles

These wall tiles are composed of quartz stone particles bound with polymer resin, offering water resistance for bathroom and kitchen applications. The resin binder and quartz aggregate classify them under tariff item 6810.19.00 as other articles of artificial stone.

Recycled Stone Agglomerate Tiles

These eco-friendly tiles are made from recycled stone waste agglomerated with resin, providing a sustainable flooring option. The resin binder and recycled stone aggregate place them under tariff item 6810.19.00 for other articles of artificial stone.

Sandstone Polymer Wall Tiles

These textured wall tiles are made from sandstone aggregates bound by polymers, suitable for exterior cladding. The polymer binder and sandstone aggregate classify them under tariff item 6810.19.00 as other articles of artificial stone.

Sintered Stone Composite Tiles

These large-format tiles are made from sintered stone aggregates with resin binders, often cut into tile sizes for countertops or flooring. The resin binder and stone aggregate place them under tariff item 6810.19.00 for other articles of artificial stone.

Slate Composite Tiles

These composite tiles blend slate particles with binders, designed for roofing-style floors. The binder and slate aggregate classify them under tariff item 6810.19.00 as other articles of artificial stone.

Terrazzo-Style Stone Tiles

These terrazzo-inspired tiles feature stone chips embedded in a resin matrix, creating a decorative flooring surface. The resin matrix and stone chips place them under tariff item 6810.19.00 for other articles of artificial stone.

Travertine Agglomerate Floor Tiles

These flooring tiles are produced by agglomerating travertine stone dust with epoxy binders, mimicking luxury natural stone at a lower cost. The epoxy binder and travertine aggregate classify them under tariff item 6810.19.00 as other articles of artificial stone.

Artificial Stone Bridge Girders

Prestressed artificial stone bridge girders composed of polymer concrete with fiber reinforcement, designed for pedestrian or light vehicle bridges. These prefabricated structural components are manufactured off-site and installed as load-bearing spans in civil engineering projects, qualifying under tariff item 6810.91.00.

Artificial Stone Wall Panels

Prefabricated wall panels made from engineered stone (resin-bound aggregates) for exterior building walls in commercial structures. These load-bearing or curtain wall components are molded for precise fitting and used in building construction, falling under tariff item 6810.91.00 as prefabricated structural components.

Concrete Foundation Piles

Precast prestressed concrete piles driven into the ground for building foundations in civil engineering works. Manufactured with high-strength concrete and tensioned steel strands for deep support, these are prefabricated structural components for civil engineering, qualifying under tariff item 6810.91.00.

Precast Concrete Columns for Bridges

Tall precast concrete columns with prestressed reinforcement, used as piers in bridge construction for civil engineering projects. Produced in factories with precise dimensions for quick on-site erection, these are prefabricated structural components for civil engineering, falling under tariff item 6810.91.00.

Precast Concrete Retaining Walls

Modular precast concrete panels and posts for soil retention in civil engineering projects like highways and residential grading. Designed with interlocking joints and reinforcement for lateral earth pressure, these are prefabricated structural components for civil engineering, qualifying under tariff item 6810.91.00.

Precast Concrete Tunnel Segments

Ring segments of reinforced concrete for tunnel lining in underground civil engineering projects like subways. Precision-cast with gasket grooves for watertight assembly, these are prefabricated structural components for civil engineering, falling under tariff item 6810.91.00.

Precast Reinforced Concrete Beams

Precast concrete beams reinforced with steel rebar, designed for use in building construction as load-bearing structural elements. These components are manufactured off-site and transported for assembly in bridges or multi-level buildings, qualifying under tariff item 6810.91.00 as prefabricated structural components.