Sourcing box culverts from China

Duty on precast concrete box culverts

Heading 6810 covers articles of cement, concrete or artificial stone, whether reinforced or not. The prefabricated structural components line, 6810 91 00 00, is the relevant starting point for concrete box culverts used in civil engineering. The table shows product variants sharing that tariff line, rather than separate commodity codes.

Read from the UK Trade Tariff on 30 September 2026, all supplied lines under this heading carried 0% duty for goods from China. The supplied data lists no anti-dumping or countervailing measures, suspensions or attached import controls. Import VAT is separate from duty.

Give your customs broker the material, drawings and intended civil engineering use to confirm the commodity code. For related products within this heading, see precast concrete drainage channels.

Specify the opening, loading and joints

Have the project engineer approve the clear opening, section length, wall and slab thicknesses, reinforcement, concrete specification, cover and dimensional tolerances. State burial conditions, traffic loading, groundwater conditions and joint sealing expectations. Identify straight sections, end sections and any split components on the order drawings.

CE-marked construction products can continue to be supplied in Great Britain where EU requirements are met. Any third-party assessment for that route must use an EU recognised notified body. Ask for the declaration of performance and supporting assessment documents for the exact culvert design, rather than accepting a certificate for another concrete product.

Agree lifting points, section weights, support positions and packing arrangements before production. Request handling and installation instructions, and have the receiving contractor review the unloading plan.

Worked duty example

Illustrative example, not a quote: Illustrative project batch of compact precast concrete box culvert sections under 6810 91 00 00, invoiced at £15,000 free on board, with £6,000 of freight and insurance to the UK. The customs value is £21,000. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £21,000, so it is £4,200. With no duty, the only import tax is the VAT, which a VAT-registered importer can usually reclaim. The import duty and VAT guide explains each step.

Inspection checklist

Dimensions and fit: measure the opening, thicknesses, diagonals and joint profiles against approved drawings. Trial-fit adjoining sections and seals before shipment.

Reinforcement and concrete: inspect cage layout and cover before casting; match material records and concrete test results to the production batch. Record any repairs.

Surface and identification: check for cracks, honeycombing, exposed reinforcement and damaged joint edges. Match section identification to drawings and delivery records during inspection.

Loading and arrival: check lifting inserts, support pads, restraint and edge protection. Photograph each section before loading and inspect it again on arrival, especially around lifting points and joint faces.

What goes wrong

A section can match the opening dimensions yet have reinforcement unsuitable for the project's loading or burial conditions. Joint faces cast out of square leave gaps, damaged seal grooves prevent seating, and inconsistent dimensions make assembly difficult. Resolve drawing changes with the project engineer before casting.

Poor support during transport can crack corners or joint edges. Surface patching can hide honeycombing without resolving the underlying defect. Agree repair acceptance with the engineer and retain photographs and batch records; do not accept a cosmetic repair as proof of structural suitability.

Cambridge China Bridge sources these products for UK businesses, checking the factory and the documents before shipment. See factory verification. For repeat volumes, see container programmes.