Quick Answer: Per IICL Container Industry. A flat-rack shipping container is a deck with two end-walls and no sides or roof, built to ISO 1496-5 for ocean shipping of oversize cargo like heavy machinery, boats, yachts, transformers, and helicopters. It is not weather-sealed and is almost never the right purchase for yard storage. 30+ years operating, 4.9 stars on 124+ Google reviews. 1-3 day delivery Ontario-wide from our Brantford yards.
In This Guide
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What Is a Flat-Rack Shipping Container?
A flat-rack shipping container is a steel cargo deck fitted with two reinforced end-walls and no sides or roof, built to ISO 1496-5 for ocean shipping of oversize freight. It keeps the eight standard corner castings so it can be stacked and lifted like any intermodal box, but the cargo rides out in the open.
Picture a standard 20-foot or 40-foot shipping container. Now strip off the roof. Strip off the long side-walls. Strip off the cargo doors. You are left with a heavy steel deck the size of the floor, two reinforced end-walls (one at each short end), and a set of corner castings at the eight ISO corners so the unit can still be stacked, lifted, and lashed to a ship’s hold like any other intermodal box. That is a flat-rack.
It is not a box. It is a deck with end-walls. The cargo sits on the deck out in the open, exposed to whatever the weather does. The whole point of the design is to carry things that would not fit through a 7-foot 8-inch door, or under a 7-foot 10-inch interior ceiling, or between 7-foot 8-inch wide interior walls. If your cargo is wider than the box, taller than the box, or longer than the box, then the box itself is the problem, and the flat-rack solves it by removing the box.
In the global shipping trade, flat-racks fall under a small family of specialised intermodal equipment that also includes open-tops (roof removed but sides still on), platform containers (no end-walls at all, just the deck), and over-dimensional flatbeds. Each one exists for a specific kind of cargo problem. Flat-racks are the most common of these specials because they retain enough structure (the two end-walls) to be safely stacked and lifted by container handlers, while still being open enough to handle oversize freight on three of four sides.
Paul LeBlanc, owner of Van Blanc, has spent 19 years specifically in containers and 40 years in Asian trade. He puts the flat-rack in plain terms: “In 19 years I have seen a flat-rack come into a Canadian yard maybe a dozen times, and almost every one was a special order, not stock. A flat-rack is not a storage box and it was never meant to be. It is ocean equipment. If your steel is not getting on a ship, you are looking at the wrong product.” There is a reason these units stay rare in Ontario, and we will get to it.
The flat-rack in one sentence
A flat-rack is the international shipping industry’s answer to cargo that physically will not fit inside a sealed box. It is a deck with end-walls, made to ISO 1496-5, used almost exclusively on ocean vessels and rail to carry heavy machinery, vehicles, boats, and project cargo across borders. It is not designed for storage, not designed for site offices, and not designed for any use case where keeping water off the cargo matters.
Are Flat-Rack End-Walls Collapsible or Fixed?
Flat-racks come in two end-wall designs, and a buyer should know which one they are being quoted. There are fixed-wall flat-racks, where the end-walls are welded upright for the life of the unit, and collapsible flat-racks, where the end-walls fold flat against the deck when the unit is empty. The split matters because it affects price, durability, handling, and resale value.
Fixed end-wall flat-racks
The end-walls are welded to the deck and stay vertical for the life of the unit. Fixed flat-racks are simpler, heavier per unit, and built for the highest payload ratings. A 40-foot fixed flat-rack from a major lessor will commonly carry 45,000 kilograms of static payload, with the newest designs rated up to 50,000 kilograms. They are favoured for repeat heavy-lift work, mining equipment, transformer shipments, and any cargo where bracing against the end-walls (rather than just sitting on the deck) is part of the load plan.
The downside is empty-return logistics. A fixed flat-rack is essentially a permanent deck-and-frame structure that takes up the same vessel space whether it is loaded or empty. Steamship lines hate empty repositioning costs, and fixed flat-racks have to ride back across the ocean as a discrete unit.
Collapsible end-wall flat-racks
The end-walls fold flat against the deck when the unit is empty. Five collapsed flat-racks stack into roughly the cubic footprint of one standard 40-foot box. That single design feature is why collapsibles have become the dominant new build in the global fleet over the last decade. Once they are empty, they ship back as a stack. Less vessel space, less yard space, lower repositioning cost.
The trade-off is a slight payload reduction and a slightly higher unit price when new. Collapsibles also wear differently. The folding hinges and end-wall locks are a maintenance point that fixed units do not have. A 15-year-old collapsible coming off lease will usually have at least one hinge that needs attention before it is offered as cargo-worthy again.
If you ever do need to buy one
For most one-time oversize shipments out of Canada, a collapsible 40-foot flat-rack is what your freight forwarder will quote and what the steamship line will provide. Fixed units are usually only relevant for fleet buyers (heavy haulers, project-cargo specialists) who keep them in continuous rotation. If a Canadian yard is offering you a one-off fixed flat-rack for sale, ask how it ended up there. Often the answer is that a heavy-haul contract ended and the unit got dropped off cheap.
What Does ISO 1496-5 Spec for a Flat-Rack?
The international standard that governs flat-racks is ISO 1496-5: Series 1 freight containers (Specification and testing), Part 5: Platform and platform-based containers. ISO 1496-1 covers the standard general-purpose dry box that most buyers already know. Part 5 of the same standard covers the variations that lose the side-walls and roof: platforms, flat-racks, and collapsible flat-racks. The test regime in Part 5 is different from the dry-box regime because the structural load paths are different. Without sides and roof contributing to rigidity, the deck, end-frames, and corner castings have to carry everything.
The published dimensions and load ratings are remarkably consistent across the major manufacturers and lessors, because all of them are working to the same ISO envelope.
| Spec | 20ft Flat-Rack | 40ft Flat-Rack |
|---|---|---|
| External length | 6.06 m (19’10”) | 12.19 m (40’0″) |
| External width | 2.44 m (8’0″) | 2.44 m (8’0″) |
| External end-wall height | 2.59 m (8’6″) | 2.59 m (8’6″) |
| Internal deck length | 5.94 m (19’6″) | 12.06 m (39’7″) |
| Internal deck width | 2.40 m (7’10”) | 2.40 m (7’10”) |
| Tare weight (typical) | 2,500 to 2,900 kg | 4,700 to 5,200 kg |
| Maximum payload (typical) | 27,000 to 31,000 kg | 40,000 to 45,000 kg |
| Maximum payload (newer 40′ static) | n/a | up to 50,000 kg |
| Lashing rings on deck | typically 8 to 12 | typically 12 to 24 |
Two practical notes on those numbers. First, the internal deck width is the same as a standard dry box because the corner castings sit at the same ISO positions. The width gain on a flat-rack comes from being able to load cargo that overhangs the deck on the long sides, which is permitted within in-gauge tolerances and handled with lashing and bracing. Second, the payload is heroic compared to a dry box (a 40-foot HC dry box maxes out around 27,000 kg payload), because the flat-rack’s load path goes straight from the deck into the corner castings and bottom rails rather than transferring through side panels.
What the CSC plate looks like on a flat-rack
Like any other ISO container, a flat-rack carries a Container Safety Convention plate certifying it for international transport. The CSC plate on a flat-rack lists the same fields you would see on a dry box (gross weight, racking test load, stacking test load), but the deck strength rating is the field that matters most because that is what the freight forwarder will check before they accept a heavy load. WWT-grade or expired-CSC flat-racks turning up in resale yards have lost their international shipping eligibility. They are fine if you want to bolt one to a pad and use it as a deck, but no steamship line will load cargo onto them.
What Actually Ships on a Flat-Rack?
A flat-rack carries the oversize freight that will not fit through a dry-box door or under its ceiling. Globally, flat-racks are project-cargo workhorses. Walk a container terminal in Antwerp, Rotterdam, Singapore, or Vancouver and the flat-racks coming off the vessel are loaded with the things that simply could not fit through a dry-box door. The list is consistent across decades.
Heavy machinery
Excavators, dozers, mining shovels, loader buckets, crusher jaws, forestry harvesters, agricultural combines and headers. Anything tracked or wheeled that is wider than 7’8″ rides on a flat-rack. The end-walls let lashing chains run over the unit in a way that holds the machine firm against vessel roll.
Boats and yachts
Sailboats, powerboats, runabouts, small commercial vessels up to roughly 14 metres. Larger yachts go on dedicated yacht carriers, but in the 8 to 14 metre range a flat-rack with custom cradles is the standard intermodal solution. Boat hulls are wider than a dry box and the keel needs vertical clearance, both problems the flat-rack solves.
Transformers, generators, industrial equipment
Substation transformers, large gensets, compressor packages, heat exchangers. The cargo here is rarely oversize in length but is almost always oversize in width or height. Power plant components in particular ride flat-rack from manufacturer to project site as a matter of course.
Helicopters and aircraft components
Light and medium helicopters ship with rotor blades removed, fuselage on a flat-rack, lashed across the deck. Aircraft sections (wings, tail sections, engines on stands) move the same way between manufacturing facilities and final assembly plants.
Long steel, pipe, lumber, timber
Anything that is long and rigid but not particularly heavy per metre. Steel beams, large-diameter pipe, structural lumber bundles, hardwood logs. The flat-rack accepts the length where a dry box would force you to cut.
Vehicles that do not fit a dry box
Buses, RVs, fire trucks, ambulances, military vehicles, oversize pickups with lift kits and aftermarket tyres. Standard passenger cars ride inside dry boxes (a 40-foot HC fits four cars in racking), but anything bigger than a Ford Excursion is a flat-rack candidate.
A real flat-rack scenario, from Paul’s notebook
The most common reason a Canadian buyer calls Van Blanc asking specifically about flat-racks is because they have an oversize industrial machine they need to ship out of Ontario to a project site abroad. Paul has handled the sourcing on a dozen of these over the years: a hydraulic press headed to Brazil, a CNC mill heading to a UAE factory, a custom-built pellet machine going to a New Zealand farm. In every one of those cases, the buyer already has a freight forwarder and a steamship booking. They are not buying the flat-rack for themselves. They are sourcing it because the forwarder told them the line was short on equipment that week and they would need to bring their own. That is the real Canadian flat-rack use case in 2026.
Do You Actually Need a Flat-Rack?
Most buyers who ask about a flat-rack do not actually need one. When someone walks into our Brantford yard and asks about flat-racks, nine times out of ten they have the wrong product in their head. They are picturing something open, easier to load, easier to walk around, more flexible than a sealed box. What they actually want is one of three other containers.
Paul LeBlanc, owner: “Most people who ask me about flat-racks really want an open-top or a side-opener. They saw a flat-rack picture online and thought it was the easy version of a shipping container. It is not. The flat-rack has no roof, no walls, no doors. You cannot leave anything on it overnight. I have had buyers tell me they wanted ‘open access’ for their loader. What they needed was a side-opener with double-doors on the 8-foot side. I sold them a 40HC standard with a side modification, and it came in well under what a flat-rack would have cost them.”
If you want to load and unload easily, you want a side-opener
A side-opener is a standard ISO box with full-length doors along one or both 8-foot sides instead of just at one end. You get sealed-box weather protection and forklift access from any point along the side. This is the right product for warehousing, jobsite tool storage, retail conversions, anywhere loading flexibility matters.
If you need to load tall things from above, you want an open-top
An open-top is a standard ISO box with the roof removed and replaced by a tarpaulin on bows. You can crane-load cargo from directly above (machinery, tall equipment, bulk granular material) and then tarp the unit closed for ocean transit. Open-tops are the right product for anything taller than 7’10” that still benefits from side-wall protection, and we cover the trade-offs in detail in our guide to crane-loading from above with a removable-roof box. If you are still mapping which body style fits your load, the full range of container types we stock and source lays them out side by side.
If you actually want storage that handles oversize, you want a 40HC and accept the limit
A 40-foot high cube gets you 76 cubic metres of sealed storage, 2.69 metres of interior headroom, and full 4-season weather protection. For the cost of a low-grade flat-rack, you get a top-condition 40HC that will store anything you can fit through 2.34 metres of door width. If you are weighing the gap between sizes first, our breakdown of how the 20-foot and 40-foot footprints compare walks through which one suits the load.
This table lines up the flat-rack against the three products buyers most often actually need, so you can match the job to the right container before you call.
| Question | Flat-Rack | Open-Top | Side-Opener | 40ft High Cube |
|---|---|---|---|---|
| Weather-sealed? | No (open deck) | Yes (tarp closes it) | Yes | Yes |
| Roof | None | Removable tarp on bows | Fixed steel | Fixed steel |
| Loading access | All sides, open | Crane from above | Full-length side doors | End doors only |
| Handles oversize width/height | Yes | Height yes, width no | No | No |
| Good for yard storage? | No | Limited | Yes | Yes |
| Built for the ocean leg? | Yes, that is its job | Yes | Yes | Yes |
The diagnostic question that gets buyers to the right product
When someone asks Paul about flat-racks, his first question is always: “Is the cargo travelling on an ocean vessel?” If the answer is no (the cargo is going onto a flatbed truck and staying in Canada, or being stored on the buyer’s property, or being moved between Canadian sites), then a flat-rack is the wrong product. Flat-racks exist for the ocean leg of an intermodal journey. Remove the ocean leg and you remove the reason the flat-rack design exists in the first place.
Why Are Flat-Racks Hard to Buy in Canada?
Flat-racks are hard to buy in Canada because the resale market for them is small and odd. Standard dry boxes flow through Canada in volume. Toronto, Montreal, and Vancouver are major intermodal terminals, and used dry-box inventory turns over constantly. Flat-racks do not flow the same way, for two reasons.
First, the global flat-rack fleet is much smaller than the dry-box fleet. Drewry’s container census data has the flat-rack and platform population at roughly 1% of the global container fleet, against the ~95% share held by dry boxes. There are simply fewer flat-racks coming off lease and into resale at any given time.
Second, when flat-racks do hit the Canadian resale market, they are usually bought directly by the buyers who already use them: heavy-haul carriers, project-cargo specialists, oilfield service companies, marine transporters. Those buyers know the lessor auction calendar, watch the depot inventories, and grab good units before they ever reach a general container yard. The flat-racks that end up in a standard container dealer’s inventory tend to be the units the specialists already passed on.
This is why Ontario yards, including ours, hold very little flat-rack stock at any given time. It is not because we do not want to. It is because the units that would justify yard space are bought by specialists before they reach us. The honest answer to “do you have flat-racks in stock” is almost always “we can source one for you, but we do not keep them sitting in the yard.”
What drives flat-rack pricing in Canada
Flat-rack pricing is wide and volatile because the inventory is thin, so we quote each shipment rather than post a number that goes stale by the time you call. What moves the price is the size (20-foot versus 40-foot), the grade, the end-wall condition, and the CSC plate status. New one-trip flat-racks are rarer here because manufacturers in China and Vietnam build them to lessor order rather than for the speculative sales market, so a new unit carries a premium over a used cargo-worthy one. Delivery distance from the depot moves the number too. Tell us what you are shipping and where it is going, and we send back a current quote tailored to your specific shipment, with a real lead time, not a hopeful one. If you would rather start from stock we keep on the ground, our standard dry boxes ready to buy in Brantford are quoted the same honest way.
How Does Van Blanc Source a Flat-Rack?
Van Blanc sources flat-racks to order through our Ontario depot contacts rather than holding them in the yard, so the process for a flat-rack buyer is different from the standard dry-box workflow. Here is how it actually goes.
Step 1: We ask what the cargo is
Before we quote anything, we want to know what is going on the flat-rack and where it is going. Nine out of ten times this is the conversation where we discover the buyer does not actually need a flat-rack. We send them to an open-top, a side-opener, or a 40HC, the deal closes the same week, and the buyer saves money. This is not us upselling away from flat-racks. It is us telling buyers what the rest of the industry will not.
Step 2: If the cargo really needs a flat-rack, we ask who the forwarder is
Most legitimate flat-rack purchases are downstream of a freight forwarder booking. We want to know who is handling the ocean leg, because in many cases the steamship line will provide the flat-rack as part of the booking and the buyer does not need to source one at all. If they do need to source, the forwarder usually has a depot relationship that gives a better price than we can offer at retail. We will say so directly.
Step 3: If sourcing through us makes sense, we go to the depots
Paul has 19 years of contacts in the Canadian container depot trade. When we source a flat-rack, we call the depots directly, ask what is moving in or out, and lock in the unit before it gets pulled by a specialist buyer. Lead time depends on what is available that week: sometimes 1-3 days, sometimes 2 to 3 weeks. We give you the real lead time at the time of the call, not the optimistic one.
Step 4: We confirm the CSC plate before we sell
If the unit is going on the ocean (which is the only reason most buyers need a flat-rack), the CSC plate has to be current or the steamship line will refuse it. We confirm the plate status with the depot before we touch the sale. If the CSC is expired and re-certification would cost more than the unit is worth, we say so.
Step 5: Delivery is on a separate trailer
A flat-rack does not ride on the same tilt-deck trailer that delivers dry boxes. It has to go on a flatbed because the corner castings have to be tied down differently. We arrange the flatbed haul separately and quote the delivery as a discrete line item, not bundled into the container price. The delivery figure depends on distance from the depot to your Ontario site and the trailer the haul needs, and we quote it openly before you commit.
If you call Van Blanc about a flat-rack
Expect a real conversation, not a yes-and-quote. Paul or Christian will ask you what the cargo is, where it is going, and who is handling the ocean leg. That conversation usually clarifies whether a flat-rack is the right product. If it is, we source it through our depot network. If it is not, we point you at the container that actually fits the job. Either way you leave the call with the right answer, not the easy one.
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Frequently Asked Questions
Can I buy a flat-rack shipping container for storage in my yard?
You can, but it will not perform like a storage container. A flat-rack has no roof and no side-walls. Anything you put on it gets full weather exposure. Snow, rain, UV, road dust, raccoons. For yard storage in Ontario, the right product is almost always a Wind & Watertight 20-foot or 40-foot dry box, not a flat-rack. If you want crane-loadable storage, look at an open-top. If you want side-loadable storage, look at a side-opener.
What is the difference between a flat-rack and a platform container?
A flat-rack has two end-walls (one at each short end) that brace cargo and let the unit be stacked. A platform container has no end-walls at all. It is just the deck and the corner castings. Platforms are used for the very largest project cargo that needs lashing across the entire length without end-wall interference. ISO 1496-5 covers both designs, but platforms are far less common in regular intermodal trade than flat-racks.
How much does a 40-foot flat-rack container cost in Canada?
Flat-rack pricing in Canada is volatile because inventory is thin, so we quote each shipment instead of posting a number that goes stale. The cost is driven by size, grade, end-wall condition, and CSC plate status. A new one-trip flat-rack carries a premium over a used cargo-worthy unit, and delivery distance moves the figure as well. Tell us what you are shipping and where it is going, and we give a real price and a real lead time at the time of the call.
Are flat-rack end-walls always collapsible?
No. There are two designs in circulation. Collapsible end-walls fold down flat against the deck when the unit is empty, which lets multiple empty flat-racks stack into the cubic footprint of one dry box for efficient empty-return shipping. Fixed end-walls stay vertical permanently, which gives a slightly stronger structure and higher payload rating but worse empty-return economics. Collapsibles dominate the new-build fleet for that reason.
Can a flat-rack be modified into a container home or office?
It can, but you would be doing far more work than starting from a standard dry box. A flat-rack has no walls and no roof. To make it weather-tight you would have to fabricate walls, a roof, and door openings from scratch, at which point you have built a new structure on a steel deck. You will pay less to start with a standard 20-foot or 40-foot dry box and modify openings into it. The only reason to start with a flat-rack would be if you needed an unusually high payload rating in the finished structure.
Does Van Blanc keep flat-racks in stock at the Brantford yard?
Rarely. We source flat-racks to order through our depot network because flat-rack inventory is bought by specialist heavy-haul and project-cargo buyers before it reaches general container yards. When you call about a flat-rack, we will ask what the cargo is and where it is going, then quote a sourcing lead time. Most flat-rack orders close in 1 to 3 weeks, occasionally faster if a depot has matching stock the same week.
What standard governs flat-rack containers?
ISO 1496-5, titled “Series 1 freight containers (Specification and testing), Part 5: Platform and platform-based containers.” It defines the dimensions, structural test regime, and load ratings for flat-racks, collapsible flat-racks, and platform containers. The Container Safety Convention (CSC), governed by the IMO, covers the periodic safety inspection and the CSC plate that allows the unit to ship internationally.
What payload can a 40-foot flat-rack carry?
Typically 40,000 to 45,000 kilograms of static payload, with newer designs rated up to 50,000 kg. That is roughly 50 to 70 percent more payload than a comparable 40-foot dry box, because the flat-rack’s structural load path runs directly through the deck and corner castings rather than transferring through side-wall panels. The deck rating field on the CSC plate is the number to check before loading.
Sources
- International Organization for Standardization. (2018). ISO 1496-5: Series 1 freight containers (Specification and testing), Part 5: Platform and platform-based containers. iso.org/standard/72252.html
- International Maritime Organization. (1972, amended). International Convention for Safe Containers (CSC). imo.org
- Drewry Maritime Research. (2025). Container Census & Lease Industry Annual Report. Drewry Shipping Consultants Ltd.
- Atlantic Project Cargo. (2025). Full Guide: What Is a Flat Rack Shipping Container? atlanticprojectcargo.com
- Marine Insight. (2024). Flat Rack Containers: Types, Specifications And Dimensions. marineinsight.com
Reach Van Blanc in Brantford
We have been supplying shipping containers across Ontario since 1995. Our warehouse is at 90 Morton Avenue E in Brantford, and we deliver right across the province on a cash-on-delivery basis. No surprise fees, no chase-the-paperwork.
Van Blanc Ent. Inc. 90 Morton Ave E Unit 1B, Brantford, ON N3R 7J7. Call 519-754-6844 or toll-free 1-888-509-6658.
If you have an oversize shipment in the planning stage and you are not sure whether you need a flat-rack, an open-top, a side-opener, or a plain 40HC, call us before you commit. Paul has 19 years in containers and 40 in Asian trade. Five minutes on the phone usually points a buyer at the right container and saves them a costly mistake.