Heavy machinery leaves China one of three ways. If the machine fits through the doors of a standard container, it ships crated and bolted inside an ordinary box — the cheapest and simplest route. If it is too wide or too tall but still liftable as a unit, it travels out-of-gauge on a flat-rack or open-top container. And if it is too heavy or too large even for that, it goes breakbulk: lifted aboard a general-cargo vessel as a single piece. Which route applies is decided by three numbers — the machine's width, height and weight — and the answer drives everything else: the crating specification, the freight quote, the lashing plan and the insurance. This guide walks through each option in turn, plus the packing details that decide whether your machine arrives ready to run or rusted and out of alignment.
Will your machine fit in a standard container?
The first check is not the container's internal length — it is the door. A container can only receive what passes through its door aperture, which on a standard 40-foot box is roughly 2.3 metres wide and a little under 2.3 metres high. Many industrial machines — CNC machining centers with their enclosures fitted, long cutting saws, press brakes — sit right at or beyond that envelope. Ask the manufacturer for the packed dimensions and weight of each crate before anyone books freight, and compare them against the door opening, not the nominal container size. Sometimes a machine fits only after partial disassembly: enclosures, conveyors, control pendants and extraction hoods come off and travel in a second crate, which adds reassembly work at your end but keeps the shipment in a standard box.
Weight matters as much as size. Even where a heavy machine physically fits, container payload limits and — more often — road weight limits for the truck leg at each end set the practical ceiling. A dense machine concentrated on a small footprint may also need load-spreading timbers inside the container so the point load does not damage the floor. If the machine fits a standard box, the freight side of the booking works like any other full-container shipment; our guide to FCL and LCL sea freight from China covers that mechanics, though machinery at this scale is almost always FCL — sharing a box with other cargo invites handling damage.
What does proper export crating involve?
Crating is where machinery shipments are won or lost, and it is worth specifying rather than leaving to default. A proper export crate starts with the base: a skid of structural timber sized to the machine's weight, with the machine bolted — not just strapped — through its foundation holes to the skid, so it cannot shift when the crate is tilted or braked hard on the road. The crate walls carry marked lifting points and centre-of-gravity marks so crane and forklift operators handle it correctly.
All solid-wood packaging must comply with ISPM 15, the international standard for wood packaging material: the timber is heat-treated or fumigated and stamped with the IPPC mark. Customs and quarantine authorities in most destination countries check for it, and a missing or invalid stamp can mean the crate — with your machine inside — is re-treated, re-exported or destroyed at your cost. Inside the crate, the machine should be sealed in a vacuum or VCI (vapour corrosion inhibitor) barrier with desiccant, and bare machined surfaces coated with anti-rust grease, because a machine crossing the ocean passes through repeated condensation cycles. Established machinery builders treat this as routine — Manlide Equipment, a Foshan manufacturer of CNC machining centers, cutting saws and end-milling machines for aluminum profiles, ships CE- and REACH-compliant machines export-crated this way as standard — but it is still worth writing the packing specification into the purchase contract so "export packing" is defined, not assumed.
When do you need a flat-rack or open-top container?
When a machine is too wide or too tall for a container door but can still be lifted as one piece, the shipment goes out-of-gauge (OOG) on special equipment. A flat-rack is essentially a container floor with end walls and no sides or roof: the machine is craned on, then lashed and chocked to the rack's securing points. An open-top container keeps its walls but replaces the roof with a removable tarpaulin, suiting machines that are over-height but within width. Both travel on normal container ships, which keeps schedules and routings close to standard FCL service.
The differences from a normal booking are practical. Out-of-gauge cargo occupies the slots beside or above it, so carriers price OOG with surcharges for the lost slots, and quotes vary more between carriers than for standard boxes. Lashing must be engineered: the forwarder or a marine surveyor produces a securing plan, and on arrival the receiving port needs equipment able to lift the piece off. Weather protection is also weaker — a machine on a flat-rack rides under tarpaulin or shrink-wrap, not inside a sealed box, so the corrosion protection described above matters even more. Get the packed dimensions early, because the gap between "fits a high-cube container" and "needs a flat-rack" can be a few centimetres and a meaningful amount of money.
What is breakbulk shipping and when does it make sense?
Breakbulk means the cargo is not containerized at all. The machine — usually skidded or in a very large crate — is lifted aboard a multipurpose or general-cargo vessel by the ship's own cranes or shore cranes, stowed in the hold or on deck, and lifted off the same way at destination. It is the route for pieces too heavy or too large even for flat-rack handling: large press lines, complete production cells shipped assembled, or machines whose disassembly would cost more than the freight saving.
Breakbulk trades flexibility for convenience. Sailings are less frequent than container services and often routed via fewer ports, transit times are longer, and port handling at both ends needs more coordination — heavy-lift cranes, special trailers for the road leg, sometimes route surveys for bridges and overhead clearances. Pricing is by weight or volume and negotiated per shipment rather than tariffed. For buyers, the practical advice is to involve a forwarder with genuine project-cargo experience before the machine is built, because decisions made at the design stage — split points, lifting lugs, whether the base frame can be unbolted — determine whether you need breakbulk at all. Roll-on/roll-off (RoRo) vessels are a related option, but only for cargo that can roll aboard on its own wheels or a roll trailer; static industrial machinery rarely qualifies.
How do you protect the machine — and your money — in transit?
Whatever the mode, three protections are worth insisting on. First, transit indicators: shock and tilt indicators fixed to the crate record whether it was dropped or laid over in transit, and give you evidence for a claim before you even open the box. Second, marine cargo insurance on all-risks terms covering the full replacement value plus freight — machinery claims are exactly the kind of large, single-item loss that minimal coverage handles badly. Third, photographic documentation: the factory photographs the machine before sealing the barrier foil and after crating, and you photograph the crate on arrival before opening it, so responsibility for any damage is traceable to a leg of the journey.
On cost, remember that the sea freight line item is only part of the bill. Out-of-gauge surcharges, heavy-lift fees, port handling, the special trailer for the final road leg and unloading at your site all land on top, and for OOG and breakbulk moves these destination charges can rival the ocean freight itself. Build the full picture the same way you would for any import — our guide to calculating landed cost for China imports walks through the framework — and agree the Incoterm deliberately: FOB keeps you in control of the main carriage with your own forwarder, while CIF or DAP quotes from the seller need line-by-line scrutiny of what handling at destination is actually included. Finally, plan the arrival end before the machine ships: rigging crew, forklift or crane capacity, and door clearances at your own building. A machine that crossed the ocean intact can still be lost a hundred metres from its foundation.
Do wooden crates from China need to be fumigated or heat-treated?
Yes. Solid-wood packaging entering most countries must comply with ISPM 15 — heat treatment or fumigation, evidenced by the IPPC stamp on the timber. Crates without a valid mark can be quarantined, re-treated or destroyed at the destination port at the importer's cost. Check that the factory or its packing contractor uses certified treated timber and that the mark is visible on the crate photos before shipment.
What is the difference between a flat-rack and breakbulk?
A flat-rack is still a container: an open platform that travels on a regular container vessel, used for cargo that exceeds a standard box's width or height but can be craned as a unit. Breakbulk dispenses with containers entirely — the piece is lifted aboard a general-cargo vessel individually. Flat-rack keeps container-line schedules and pricing structures; breakbulk suits what even a flat-rack cannot carry.
Is RoRo an option for machinery from China?
Only for cargo that can roll: vehicles, wheeled construction plant, or machinery loaded onto a roll trailer. Static industrial machines such as CNC machining centers, saws and presses ship crated in containers, on flat-racks, or breakbulk instead.
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