Guide
Is LCL or FCL Better for Shipping Dense Machined Parts from Vietnam?
Shipping dense machined parts is a weight problem before it is a volume problem: steel, brass and stainless parts packed on pallets usually reach a container’s weight limit or LCL’s weight-based billing long before they fill the box, so the usual “go FCL once you pass a few cubic meters” rule of thumb is unreliable for them.
By Saola Manufacturing engineering team · Published · Updated
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Why does the usual LCL-versus-FCL rule fail for dense machined parts?
Because the rule assumes cargo that fills space before it reaches the weight limit, and metal parts do the opposite. For dense cargo the number that decides the choice is weight per pallet, not cubic meters.
Freight advice for general cargo is built around volume: once a shipment fills a meaningful share of a box, a full container load is cheaper than paying a consolidator for each cubic meter. That logic works for furniture or consumer goods. One freight guide notes that high-density cargo such as metals “often reach weight limits in a 20ft container long before filling the available volume” (Freightamigo, 2026), and a second makes the same point about heavy cargo and why a 20-ft box suits dense goods (Dimerco, 2026).
Machined steel, brass and stainless parts are a clear example. Even after allowing for crates, dividers and air between parts, a pallet of finished parts is heavy for its footprint. That changes three things at once: the weight limit of the container, the weight limit of the truck that collects it at the destination, and the way an LCL consolidator bills the shipment. The next sections take them in that order, and the section on lots explains why a part bought as several lots a year makes the choice a planning decision rather than a one-time quote comparison.
How does LCL billing treat heavy cargo?
LCL is billed on whichever is greater, the shipment’s volume in cubic meters or its weight converted at one cubic meter to one metric ton. A dense shipment is therefore billed on weight, and the volume advantage of LCL disappears.
Consolidators quote LCL per revenue ton, and ocean convention takes one cubic meter as equal to 1,000 kg for the comparison (Marine Insight, 2026). As a typical example, a shipment that measures 0.6 cubic meters but weighs 900 kg is charged as 0.9 of a revenue ton, because weight is the larger number. Typical packed machined-metal cargo sits well above the break-even density of 1,000 kg per cubic meter, so for most of these shipments the chargeable quantity equals the weight.
This is the key difference from a light, bulky shipment. A bulky shipment can look cheap in LCL because it is billed on its small weight in cubic-meter terms; a dense one cannot. Every extra pallet adds a full pallet’s weight to the bill, and the consolidator also adds origin and destination handling charges for each shipment. The comparison to run is therefore simple: chargeable revenue tons multiplied by the LCL rate and its local charges, against one FCL box rate with its local charges. The break-even is the box rate divided by the LCL rate per ton, and it is reached at a far smaller shipment than the cubic-meter rule suggests.
Ask the forwarder to quote LCL on a revenue-ton basis and to state which ton is meant. A short ton, a metric ton and a long ton are not the same weight (a short ton is roughly a tenth lighter than a metric ton), and a quote that just says “ton” is ambiguous.
What does a 20-ft container really hold in weight and pallets?
A 20-ft dry container has roughly 33 cubic meters of space and room for about ten or eleven pallets on the floor, but its usable weight is often limited by roads rather than by the box. Work out the pallet count and the road limit first, then compare with the payload rating.
The table collects the figures a buyer needs for the check. Payload ratings differ by operator and container build, so treat the ranges as planning values and ask the carrier for the rating of the box actually booked.
The binding limit for a dense load is often not the container but the road leg. One forwarder reports that most shippers keep cargo below 37,000 lb in a 20-ft box so that trucks can legally carry it, and that in the United States a tractor-trailer limit of 80,000 lb leaves roughly 42,000 to 44,000 lb for cargo in a 40-ft unit (Dimerco, 2026). The 80,000 lb figure is the federal gross vehicle weight cap on the Interstate System, unless the bridge formula sets a lower limit (23 CFR 658.17(b)). Other road networks have their own axle limits, which can force a lighter loading than the box allows (Freightamigo, 2026). A load planned to the container’s maximum payload may therefore need to be split or re-handled at the port.
| Item | Typical figure | Why it matters for dense parts |
|---|---|---|
| Internal volume | 32.6 to 33.2 m³ | Rarely the limiting factor for metal parts |
| Tare weight | 2,100 to 2,300 kg | Counts against the gross weight rating |
| Maximum payload | 21,700 to 28,200 kg (operator and route dependent) | Ceiling set by the box and the carrier |
| Floor pallets | 10 US pallets (40 x 48 in) or 11 Euro pallets (1.2 x 0.8 m) | Sets how many pallets fit before weight is even considered |
| Road-driven cargo guideline | Below 37,000 lb (about 16,800 kg) for a 20-ft box | Often the real limit when the box is trucked inland |
| Pallet weight that reaches payload (derived) | About 2,170 to 2,820 kg per pallet if ten pallets fill the floor | Shows how heavy a pallet must be before the box rating binds |
When is LCL still the right choice for dense machined parts?
When the shipment is small enough that its chargeable weight costs less than a box, and when a short lot is needed sooner than the next full container can be justified. For a dense part that happens at a few pallets, not at a few cubic meters.
LCL earns its place in three situations. First, a pilot or first-article lot that is only a fraction of a pallet or a few pallets, where waiting to fill a box would delay validation more than the freight saves. Second, a spare-parts or top-up shipment between regular container loads. Third, a part family with a split destination, where consolidating by destination matters more than the box rate.
The costs of LCL are not only the rate. Cargo is unloaded and re-stowed at a consolidation warehouse at both ends, so it is handled more often, waits for the consolidator’s cut-off and release schedule, and is more exposed to moisture and knocks. Bare steel parts in particular should carry corrosion protection before they are consolidated; the guide on VCI packaging for ocean freight covers how to specify it. Pallet strength matters as well: a heavy pallet that is double-stacked or re-handled needs a proper base and strapping.
How do lot size and packing decide the container choice?
Annual volume split into lots sets the cargo weight per shipment, and packing sets how that weight sits on the floor. Choose the lot size and the pallet configuration first, then let the container follow.
Take a part ordered at 10,000 to 20,000 units a year and shipped as a handful of lots. If each lot is one or two pallets, LCL is likely the honest answer for that lot; if two or three lots can be combined into one shipment of several pallets, a 20-ft FCL becomes realistic. That is why the container question belongs after the lot-size decision, not before it: the buyer should compare the cost of holding the extra stock from a larger combined lot against the freight difference, rather than pick the box first.
Packing choices change the answer. Heavy parts packed in many small cartons on a pallet waste floor space; fewer, stronger cartons or crates raise the weight per pallet and bring the box closer to a road-weight limit. Mixed part numbers on one pallet complicate counting. A practical rule is to choose pallets whose loaded weight leaves comfortable margin under the road guideline and under the payload rating, and to write that weight into the packing specification.
For a regular program, a buyer can set a standing 20-ft FCL booking pattern and keep LCL for exceptions. Who books the freight also depends on the trade term; the guides on EXW versus FCA and FOB versus delivered terms explain how the term moves that decision between buyer and supplier.
What should the RFQ and packing list say so the choice can be made?
State the packed weight per pallet, the pallet count and the pallet footprint for every lot, and ask for them again on the packing list. With those three numbers a forwarder can quote LCL and FCL side by side.
Ask the supplier to give, per part number and per lot: net weight per piece, pieces per carton, cartons per pallet, loaded pallet weight and pallet dimensions. Carriers require a verified gross mass for packed containers under SOLAS, so the weight on the booking should come from real weighing rather than from a catalog estimate; check the current rule with your forwarder.
Also state the destination handling: whether the consignee can unload a heavy pallet with a forklift, whether the delivery truck has weight limits, and whether partial deliveries are acceptable. Then ask the forwarder for both an LCL quote on a revenue-ton basis and an FCL quote for the same cargo, with local charges itemized.
Turned and milled steel, brass and stainless parts made by CNC turning and CNC milling are quoted from Saola’s lead CNC plant; send the target pallet weight and configuration with the drawing through the quote form so the packing plan can be discussed before the first shipment.
Frequently asked
Is a 40-ft container better than a 20-ft for heavy machined parts?
Usually not. A 40-ft box has more space than dense cargo can use and a similar road-weight problem, so a 20-ft container is often the better fit for heavy goods (Dimerco, 2026).
How do I know whether my cargo is dense enough to be billed on weight in LCL?
Divide the loaded pallet weight in kilograms by its volume in cubic meters. If the result is above 1,000, the consolidator bills on weight (Marine Insight, 2026).
Can I mix dense parts with light parts in one container?
Yes, and it often balances the load: the dense parts supply the weight and the light items fill the space. The pallets still have to be stable, weighed and declared accurately.
Does LCL damage machined parts more often than FCL?
There is no universal rate to quote, but LCL cargo is handled more often and shares a box with other shippers’ goods, so packaging and corrosion protection matter more.
Does the choice change the customs treatment of the parts?
The container choice does not change classification or duty. Country-of-origin and entry documentation follow the goods, whichever way they travel.
Sources
- Ocean freight container specifications, Dimerco, 2026
- 20ft container dimensions: sizes, weights and capacities, Freightamigo, 2026
- What is CBM rate in shipping?, Marine Insight, 2026
- 23 CFR 658.17, Weight, Legal Information Institute, Cornell Law School, accessed 2026