Flat Rack Container Shipping: When and How to Use It for Vehicles

A flat rack container is an open-sided, open-top steel platform with reinforced end walls (which can often be folded down) but no side walls or roof. Unlike standard dry containers used for most car shipping methods, flat racks are designed to carry cargo that exceeds the height, width or weight limits of a normal box container. They come in 20ft and 40ft lengths, with typical payload capacities of 30–45 tonnes depending on the shipping line.

For vehicle shippers, flat racks are the standard solution for tractors, combine harvesters, buses, motorhomes, boats on trailers, and lifted 4x4s that won't fit inside a conventional container. They're loaded and secured using chains, turnbuckles and steel lashing points welded to the deck, then typically wrapped in tarpaulin for weather protection during the voyage.

You'll typically need a flat rack when your vehicle's dimensions exceed a standard container's internal height (around 2.39m) or width (2.35m). Common examples include agricultural machinery, plant equipment, lifted trucks with roll bars or roof tents, and vehicles fitted with wide off-road tyres or bull bars that push beyond standard clearance.

Flat racks are also useful when a vehicle is non-runner and unusually heavy, since the open sides allow crane or forklift access from multiple angles rather than relying on a single container door. If you're shipping heavy machinery overseas, a flat rack is very often the only practical option, particularly for tracked plant or wide-wheelbase agricultural kit.

Booking a flat rack requires accurate dimensions and weight declared upfront — shipping lines charge by both weight and space, and inaccurate declarations can lead to costly re-weighing fees or booking cancellation at the terminal. You'll need the vehicle's V5C (or export certificate if already deregistered), a bill of lading, and for commercial or plant machinery, often a certificate of conformity or manufacturer's technical specification sheet.

Most shipping lines require flat rack cargo to arrive at the port for lashing inspection at least 3–5 working days before vessel cut-off, since the securing process is more labour-intensive than standard RORO or container loading. We coordinate directly with the terminal's lashing gang to ensure your booking isn't delayed.

Flat rack shipping typically costs more than standard container or RORO shipping because of the specialist handling, lashing materials and reduced vessel space efficiency. As a guide, a 20ft flat rack from Southampton or Tilbury to West Africa runs from roughly £2,200–£3,500, while routes to the Middle East or South Asia average £2,500–£4,000 depending on cargo weight and dimensions. Oversized loads exceeding standard flat rack limits may require a break-bulk or heavy-lift quote instead.

Transit times mirror standard container routes: 3–4 weeks to West Africa, 4–5 weeks to the Gulf, and 5–7 weeks to Southern Africa or Oceania. Use our cost calculator for an indicative quote, though flat rack cargo generally needs a manual assessment given its bespoke nature.

Because flat racks have no walls or roof, protecting your vehicle from salt spray and rain during a multi-week voyage is essential. Professional operators use heavy-duty tarpaulins secured with ratchet straps, combined with rust-inhibiting wax or wrap on exposed metal and electrical components. Glass and mirrors are usually removed or boxed separately if fragile, and fuel tanks should be drained to a quarter or less to reduce weight and fire risk.

Lashing must comply with the CTU Code (Code of Practice for Packing of Cargo Transport Units), and a qualified lashing surveyor will typically inspect and sign off the securing before the flat rack is loaded onto the vessel. This inspection report protects you in the event of an insurance claim.

Standard marine cargo insurance covers flat rack shipments, but because the cargo is exposed and often high-value (machinery, boats, modified vehicles), we recommend agreed-value cover rather than standard actual-cash-value policies. Read our vehicle shipping insurance guide for the difference between total loss and all-risks policies.

Photographic evidence of the lashing and tarpaulin condition before departure is strongly advised, as is a pre-shipment condition report, since exposed cargo carries slightly higher risk of weather-related claims than sealed container shipments.