Chapter 7308 — Customs Tariff Headings

7308.20.00Towers and lattice masts

7308.30.00Doors, windows and their frames and thresholds for doors

7308.40.00Equipment for scaffolding, shuttering, propping or pit-propping

7308.90.00Other

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Products classified under Tariff item 73.08

Corrosion-Resistant Steel Bridge Abutment

A corrosion-resistant steel bridge abutment frame, galvanised for exposure to soil and road salt, transfers loads from the bridge deck to the foundations. It is a structural component specifically designed for bridge construction, qualifying as a bridge-section of iron or steel under tariff item 7308.10.00.

High-Strength Steel Bridge Tower Segment

A high-strength steel tower segment for cable-stayed bridges, featuring bolted construction and internal access, is an integral part of the bridge structure. Despite its tower-like appearance, it is designed specifically for bridge support, thus falling under bridge-sections of iron or steel.

Iron Bailey-Type Bridge Panel

A modular cast iron panel from a Bailey bridge system, with pin connections for rapid deployment, is a classic example of a bridge-section. These panels are specifically engineered for temporary or military bridges, fitting the definition of bridge-sections of iron.

Modular Steel Floating Bridge Pontoon Section

A watertight steel pontoon module for floating bridges, with ballast tanks and a reinforced deck for vehicles, is a bridge-section designed for temporary or permanent water crossings. Its buoyant structure is integral to the bridge system, qualifying under bridge-sections of iron or steel.

Modular Steel Pedestrian Bridge Deck

A prefabricated steel deck panel for pedestrian footbridges, with non-slip grating and handrail attachment points, is a bridge-section designed for safe pedestrian passage. Its specific design for bridge decks places it under bridge-sections of iron or steel.

Pre-Assembled Steel Truss Bridge Chord

A longitudinal chord member with gusset plates for pin-connected truss bridges is a critical tension or compression component. As a prepared bridge-section of steel, it is specifically shaped for bridge assembly, falling under bridge-sections of iron or steel.

Prefabricated Steel Arch Bridge Span

A prefabricated steel arch bridge span module, made from high-strength steel plates and tubes, is ready for on-site connection. Its curved design is specifically for arch bridges, making it a bridge-section of iron or steel.

Reinforced Steel Bridge Expansion Joint

A modular steel bridge expansion joint with finger plates and neoprene seals is designed to accommodate thermal movement in bridges. As an integral part of the bridge deck system, it qualifies as a bridge-section of iron or steel.

Steel Bascule Bridge Counterweight Frame

A heavy lattice frame for bascule bridge counterweights, with anchor chain attachments, is a bridge-section designed to balance the lift span. Its specific function in a draw bridge places it under bridge-sections of iron or steel.

Steel Pipe Truss Bridge Leg

Tubular steel legs forming A-frame supports for short-span bridges are prepared from welded pipes for structural use. As bridge-specific supports, they fall under bridge-sections of iron or steel.

Steel Railway Bridge Girder

An I-shaped steel girder engineered for railway bridges, with a rail-bearing top flange and shear studs for concrete deck connection, is a bridge-section designed to support train loads. Its specific bridge engineering places it under bridge-sections of iron or steel.

Steel Suspension Bridge Cable Saddle

A massive forged steel saddle for anchoring main cables on suspension bridges, machined to fit cable diameters, is a specialized bridge-section. It distributes load from the cables to the tower, making it integral to the bridge structure.

Steel Swing Bridge Pivot Pier Section

A cylindrical steel pivot pier section with a live-load ring for swing bridges, designed for marine environments, is a bridge-section that houses pivot bearings. Its specific function in a rotating bridge places it under bridge-sections of iron or steel.

Steel Truss Bridge Section

A prefabricated section of a truss bridge made from welded steel I-beams and cross-bracing, designed for assembly into pedestrian or vehicular bridges, is a classic bridge-section. Its modular design for bridge construction places it under bridge-sections of iron or steel.

Welded Steel Box Girder Bridge Segment

A hollow box girder segment fabricated from steel plates via submerged arc welding for highway overpasses is a bridge-section providing torsional rigidity. Its specific design for bridge decks places it under bridge-sections of iron or steel.

Bolt-Flanged Wind Turbine Tower Transition Piece

A transition piece with multiple bolt flanges connecting tower sections in tubular wind turbine assemblies, often tapered. This component is specifically designed for wind turbine towers, classified under tariff item 7308.20.00.

Broadcast Tower Tubular Diaphragm

Ring-shaped tubular steel diaphragms providing horizontal stiffening in FM broadcast lattice towers. They are bolted assembly components designed for sectional tower construction, falling under tariff item 7308.20.00 as parts of towers.

Broadcast TV Lattice Tower

A heavy-duty steel lattice mast designed to support multiple TV transmission antennas and side-mount equipment. It includes an ice shield and fall arrest system, making it suitable for broadcasting applications. This product falls under tariff item 7308.20.00 as a tower or lattice mast of iron or steel.

Cell Tower Steel Lattice Section

A modular lattice section made of bolted steel angles, designed for extending cellular communication towers. As a complete tower component, it provides structural support for antennas and transmission equipment. This product falls under tariff item 7308.20.00 as a tower of iron or steel.

Cell Tower Tubular Redundancy Brace

Secondary cylindrical steel bracing tubes providing redundancy in multi-legged cell tower masts. They are lightweight galvanized components designed for wind resistance, falling under tariff item 7308.20.00 as parts of towers.

Flagpole Support Steel Lattice Tower

A heavy lattice tower base structure designed for flying large national flags at government buildings. It provides the necessary height and stability for flag display. This product is classified under tariff item 7308.20.00 as an 'other' steel tower or lattice mast.

Flanged Top Section for Wind Turbine Tower

Upper steel sections with integrated flanges for bolting to the nacelle in tubular wind turbine towers, designed for onshore installations. These specialized sectional components are classified under tariff item 7308.20.00.

Galvanized Steel Cell Tower

A tall, self-supporting tower made of galvanized steel sections bolted together, designed for mounting telecommunications antennas and equipment. It is a complete tower structure of iron or steel, meeting the definition of a tower under tariff item 7308.20.00.

Galvanized Steel Lattice Tower

A self-supporting lattice mast constructed from galvanized steel angles and sections, used for telecommunications or power transmission support. It provides a durable and corrosion-resistant structure for various applications. This product falls under tariff item 7308.20.00 as an 'other' tower of iron or steel.

Galvanized Steel Tubular Tower Leg

A cylindrical, tapered steel tube used as a primary leg component in lattice mast towers for telecommunications. It is hot-dip galvanized for corrosion resistance and prepared for structural bolting, falling under tariff item 7308.20.00 as a tower component.

Guyed Mast Tubular Base Section

A wide-base cylindrical steel tube forming the foundation section of guyed radio transmission masts. It features heavy-wall construction and flange connections, falling under tariff item 7308.20.00 as a tower component.

Guyed Steel Lattice Radio Tower

A tall, guy-wire supported lattice mast made of welded steel sections for mounting radio antennas. It provides a lightweight yet strong structure for broadcasting applications. This product qualifies for tariff item 7308.20.00 as an 'other' lattice mast of steel.

Guyed Steel Radio Tower

A freestanding lattice tower supported by guy wires, built from welded steel angles for FM radio broadcasting antennas. It qualifies as a lattice mast of steel used in communication structures, falling under tariff item 7308.20.00.

High-Strength Steel Wind Tower Anchor Section

Bottom anchor sections of tubular wind turbine towers made from S355 or equivalent high-strength steel, featuring base plates for foundation bolting. These key sectional components are classified under tariff item 7308.20.00.

Lattice Steel Transmission Tower

A lattice mast constructed from angled steel sections for supporting high-voltage electrical transmission lines. It is designed for use in power grid infrastructure and qualifies as a tower of iron or steel under tariff item 7308.20.00.

Microwave Relay Lattice Mast

A steel lattice structure tower for mounting microwave dishes in point-to-point communication links. It is hot-dip galvanized for corrosion resistance and qualifies as a lattice mast of iron or steel under tariff item 7308.20.00.

Microwave Relay Steel Lattice Mast

A heavy-duty lattice tower of hot-rolled steel for supporting microwave dishes in remote communication links. It provides a robust structure for reliable signal transmission. This product is classified under tariff item 7308.20.00 as an 'other' steel lattice mast.

Microwave Tower Tapered Pole Section

A tapered tubular steel section for microwave communication tower poles in lattice configuration. It includes splice plates for field assembly and falls under tariff item 7308.20.00 as a sectional tubular tower part.

Monopole Lattice Hybrid Tower Shaft

A hybrid tubular steel shaft combining monopole and lattice features for cellular towers. It is tapered with lattice bracing points and falls under tariff item 7308.20.00 as a tubular tower component.

Observation Deck Steel Lattice Tower

A decorative lattice steel tower with platforms for public observation, built from fabricated steel members. It provides a safe and aesthetically pleasing structure for public use. This product falls under tariff item 7308.20.00 for 'other' towers and lattice masts of iron or steel.

Observation Lookout Tower

A prefabricated steel lattice tower providing elevated viewpoints for fire watch, wildlife observation, or tourism. It includes stairs or ladder access and is powder-coated for durability, falling under tariff item 7308.20.00 as a tower of iron or steel.

Observation Tower Tubular Support

Cylindrical galvanized steel tubes that serve as vertical supports in lattice observation towers, complete with access ladder provisions. These tubular elements are essential structural components for assembling towers and lattice masts of iron or steel, falling under tariff item 7308.20.00.

Onshore Tubular Wind Tower Lower Section

Heavy-duty lower sections for onshore tubular wind turbine towers, engineered to withstand shear forces and vibration. These dedicated sectional components meet the criteria for tariff item 7308.20.00.

Power Line Tower Tubular Hip Brace

Diagonal tubular steel hip braces used to stabilize leg-to-body connections in lattice power line towers. These pre-galvanized braces with clevis ends are structural components of steel towers, classified under tariff item 7308.20.00.

Segmented Tapered Wind Turbine Tower Kit Components

Pre-fabricated sectional segments for assembling tapered tubular wind turbine towers, shipped disassembled for transport efficiency. These components are classified under tariff item 7308.20.00 for tubular wind turbine tower sections.

Self-Support Steel Fire Tower

A lattice tower constructed from high-strength steel for forest fire lookout stations, with an enclosed cab option. It is wind load rated and qualifies as a tower structure of iron or steel under tariff item 7308.20.00.

Solar Farm Support Tower

A steel lattice tower for elevated solar panel arrays in utility-scale photovoltaic installations. It is designed for high wind zones and qualifies as a tower of iron or steel under tariff item 7308.20.00, distinct from panel mounting racks.

Steel Lattice Tower Spreader Bar Tube

Tubular steel spreader bars that connect lattice legs in transmission towers for added stability. These cylindrical bars with attachment brackets are integral to tower assembly, falling under tariff item 7308.20.00 for steel tower components.

Steel Tower Tubular Reducer

Conical steel tube reducers that connect different diameter sections in lattice communication towers. These galvanized reducers with stiffening rings are essential for tower assembly, classified under tariff item 7308.20.00.

Steel Transmission Line Lattice Mast

A lattice-structured steel tower designed to support high-voltage power lines, featuring cross-bracing and bolted connections. It provides a reliable and durable structure for electricity transmission. This product is classified under tariff item 7308.20.00 as an 'other' tower of iron or steel.

Steel Transmission Tower Crossarm Tube

Horizontal tubular steel members used as crossarms in high-voltage transmission lattice towers. These tapered designs with pre-punched holes for insulator attachment are key tower components, falling under tariff item 7308.20.00.

Steel Tubular Wind Turbine Tower Base Section

Large cylindrical steel base sections designed specifically for assembling tubular wind turbine towers, often tapered for structural stability. These sectional components fall under tariff item 7308.20.00.

Tapered Steel Lattice Mast Section

A conical tubular steel segment forming the upper tapered portion of a lattice mast for wind turbines. This section features pre-drilled flanges for assembly and hot-dip galvanization, classified under tariff item 7308.20.00.

Tapered Steel Wind Turbine Tower Mid Section

A tapered cylindrical mid-section made of high-strength steel, designed for stacking in multi-segment wind turbine towers. It provides the necessary height and load-bearing capacity for wind energy generation structures. This product qualifies under tariff item 7308.20.00 as a tower component of iron or steel.

Tapered Wind Tower Main Section

Large-diameter tapered steel tubes comprising the main body section of onshore wind turbine towers. These galvanized tubes with lifting lugs for sectional assembly are classified under tariff item 7308.20.00 as tubular tower components.

Telecom Tower Tubular Bracing

Cylindrical steel tubes serving as diagonal bracing elements in cell tower lattice masts. These galvanized tubes with welded end caps for sectional assembly are classified under tariff item 7308.20.00.

Utility Tower Tapered Transition Section

Tapered tubular steel transitions joining wide bases to narrower tower sections in utility lattice masts. These transitions with heavy plate flanges are classified under tariff item 7308.20.00.

Wind Monitoring Steel Lattice Tower

A portable lattice mast tower equipped for anemometers and sensors in meteorological applications. It provides a temporary or permanent structure for wind monitoring. This product is classified under tariff item 7308.20.00 as an 'other' steel tower structure.