Intermodal Container in Canada: History, Engineering, and Buyer Guide

By Christian LeBlanc, second-generation operator, and Paul LeBlanc, owner, Van Blanc Ent. Inc.

Reading Time: about 15 minutes

“Intermodal container” is the technical industry term for what most Canadians call a shipping container, sea can, C-Can, or conex box. The name describes the container’s defining feature: it can transfer between transportation modes (ship, rail, truck) without unloading. Cargo loaded into an intermodal container at a Shanghai factory can travel by truck to the port, ocean to Halifax, rail to Brantford, and truck to its final destination without ever leaving the container. Same box, multiple modes, no unloading.

This is the engineering breakthrough that transformed global trade in the 1960s and now carries approximately 90% of all non-bulk cargo worldwide. This guide tells the origin story (Malcom McLean’s 1956 SS Ideal-X voyage), the engineering (Keith Tantlinger’s twistlock and corner castings), the ISO standards that make global interoperability work, and the practical reality of buying an intermodal container in Canada today.

What Is an Intermodal Container?

An intermodal container is a standardized steel cargo box built to ISO 668 dimensions that transfers directly between ship, rail, and truck without unloading its contents. The same sealed unit travels every leg of a journey across multiple transport modes, which is exactly what the word intermodal describes.

The word “intermodal” combines two Latin roots: “inter” (between) and “modus” (mode). An intermodal container is a cargo unit designed to move “between modes” of transportation:

• Ocean ship: stacked up to 12 high in cell guides on cargo vessels
• Rail well car: double-stacked on dedicated container railcars (CN Rail, Canadian Pacific, US Class 1 railroads)
• Highway truck: single-loaded on chassis trailers behind semi-trucks
• River barge: used in inland waterway transport in Europe and limited North American routes

The “intermodal” descriptor distinguishes these containers from break-bulk cargo (loose cargo that has to be unloaded and reloaded at every mode transition), bulk cargo (oil, grain, ore transported in specialized vessels), and from non-standardized containers used only within a single mode.

Why “intermodal” is the formal industry term

“Intermodal container” is the term used in:

• ISO international standards documentation
• Industry trade publications (Journal of Commerce, Lloyd’s List, Container News)
• Container leasing industry contracts (Triton, CAI, SeaCube, Textainer)
• Shipping line operating manuals (Maersk, MSC, CMA CGM, Hapag-Lloyd)
• Port authority statistics (Port of Montreal, Vancouver, Halifax)
• Government transportation regulations (Transport Canada, US Coast Guard)

See our container terminology glossary for every term defined in one place. “Shipping container,” “sea can,” “C-Can,” and “conex box” are vernacular regional or historical names for the same product. The industry uses “intermodal container” because it describes the engineering capability that defines the product: cross-mode transferability.

Christian LeBlanc, who runs the Brantford yard day to day, puts it plainly. “A customer phones up asking for an intermodal container and means the exact same steel box as the guy who phones asking for a sea can,” he says. “The fancy word just tells you what it was engineered to do. Once it lands in our yard in Brantford it is the same box either of them wants, and we will tell you which size and grade actually fits the job.” Christian has four years of direct yard experience plus a childhood spent travelling to Asia with his father, Paul, who founded Van Blanc in 1995.

Who Invented the Intermodal Container?

The modern intermodal container has a specific birth date: April 26, 1956. That morning, the converted T-2 tanker SS Ideal-X departed Port Newark, New Jersey with 58 aluminum containers on its deck, bound for Houston, Texas. The voyage was the first commercial demonstration of containerized cargo shipping.

Malcom McLean’s insight

Malcom McLean (born November 14, 1913, Maxton, North Carolina) was a trucking executive who founded McLean Trucking in 1934. By the early 1950s, McLean Trucking had grown into one of the largest trucking companies in the United States. McLean’s insight came from observing the inefficiency of port loading: cargo arrived at the dock by truck, was unloaded by longshoremen, stored in warehouses, then individually loaded onto ships by another team of longshoremen. The process was slow, expensive, and damage-prone.

McLean’s reframe: shipping is about moving cargo, not sailing ships. If the cargo could stay in a single container from origin to destination, the multi-step loading and unloading would disappear. The container could go straight from truck to ship to rail without ever opening.

The Ideal-X voyage by the numbers

• Date: April 26, 1956
• Vessel: SS Ideal-X (converted T-2 tanker)
• Route: Port Newark, NJ to Houston, TX
• Cargo: 58 aluminum containers, 35 feet long, on deck
• Loading method, before: hand-loaded break-bulk, the costly per-ton standard of the day
• Loading method, after: containerized, a small fraction of the break-bulk per-ton cost
• Cost reduction: 36-fold

The 36-fold cost reduction made the economic case immediately. Containerization wasn’t slightly better than break-bulk shipping. It was transformative. The longshoremen who watched the Ideal-X load understood the implications immediately. One International Longshoremen’s Association official famously said of McLean: “I’d like to sink that son of a bitch.”

From Ideal-X to global trade dominance

McLean’s company (initially Pan-Atlantic Steamship, renamed Sea-Land Service in 1960) grew from one ship and 58 containers in 1956 to 27,000 containers and 36 ships by the late 1960s. The Vietnam War accelerated adoption; Sea-Land delivered 1,200 containers monthly to Indochina from 1967-1973, generating substantial revenue from US Department of Defense contracts and proving the system at military scale.

For full Malcom McLean biographical context, see our C-Can buying guide which covers the related military containerization history. For the original CONEX system that preceded McLean’s commercial breakthrough, see our sea can terminology history.

What Engineering Made the Intermodal Container Work?

McLean had the cargo-first business insight. The engineering that made it physically possible was Keith Tantlinger’s. Tantlinger (March 22, 1919 – August 27, 2011) was a mechanical engineer recruited from Brown Industries in Spokane, Washington in 1955 to become Vice President of Engineering at Pan-Atlantic Steamship.

Tantlinger’s three breakthroughs

1. The corner casting. Tantlinger designed the rectangular steel fitting at each of the eight corners of a container (4 top, 4 bottom). Each corner casting provides:

• Lifting and securing points (twistlock interface)
• Load-bearing capability for stacking (designed for 9-12 high)
• Standardized dimensions that work identically worldwide

2. The twistlock. Tantlinger’s twistlock mechanism is a metal device that slips into a corner casting opening, rotates 90 degrees to lock, and rotates back to unlock. With twistlocks:

• Containers stack securely on cargo ships in ocean storms (48-tonne shear strength)
• Containers couple to chassis trailers for road transport
• Containers attach to crane spreaders for handling
• Containers lock together horizontally on rail well cars

3. The royalty-free patent release (January 29, 1963). Tantlinger persuaded McLean’s Sea-Land to release the twistlock and corner fitting patents royalty-free. This decision was strategic: it allowed every manufacturer worldwide to adopt the design, accelerating industry standardization. Without this royalty-free release, the global container system might have been balkanized across competing proprietary designs.

This is one of the great engineering generosity stories in 20th-century industry. Tantlinger and McLean gave away the intellectual property that would have made them billions in licensing fees. But in doing so, they enabled the global standardization that turned the container into the universal cargo unit.

Tantlinger’s recognition

• 79 US patents in transportation equipment
• Gibbs Brothers Medal from the National Academy of Sciences (2010)
• NPR obituary coverage at his 2011 passing
• Inducted into industry hall-of-fame designations alongside McLean

Every intermodal container on a Brantford yard today, on a cargo ship at sea, on a rail well car crossing the prairies, has Tantlinger’s corner casting and twistlock engineering built into it.

Which ISO Standards Govern Intermodal Containers?

By the late 1960s, intermodal containers needed formal international standards to ensure global interoperability. The International Organization for Standardization (ISO) published the foundational standards between 1968 and 1972:

The five standard dimensions

ISO 668 establishes the dimensional standards for intermodal containers:

• 10ft: 2.99 × 2.44 × 2.59 m external. 16 m³ volume. Rarest size in secondary market.
• 20ft: 6.06 × 2.44 × 2.59 m external. 33.2 m³ volume. The TEU baseline.
• 40ft: 12.19 × 2.44 × 2.59 m external. 67.7 m³ volume. The FEU baseline (2 TEU).
• 45ft High Cube: 13.71 × 2.44 × 2.90 m external. 86.0 m³ volume. Premium length option.
• 53ft High Cube: 16.15 × 2.59 × 2.90 m external. 107 m³ volume. North American intermodal only (rail and truck, not ocean).

For complete dimensional detail across all sizes see our comprehensive dimensions guide.

The TEU and FEU measurement units

The container industry uses TEU (Twenty-foot Equivalent Unit) as its standard capacity measurement. A 20ft container = 1 TEU. A 40ft container = 2 TEU (also called 1 FEU, Forty-foot Equivalent Unit). A 45ft container = 2 TEU (slightly larger, same designation). A 53ft = approximately 2.65 TEU.

Global container ship capacity is measured in TEU:

• 1990: Global capacity 1.5 million TEU
• 2008: 10.6 million TEU
• 2023: Individual mega-ships exceed 24,000 TEU each
• Canadian port throughput: 7+ million TEU annually across Montreal, Vancouver, Prince Rupert, and Halifax

Is an Intermodal Container the Same as a Sea Can, Conex Box, or C-Can?

Buyers searching for intermodal containers in Canada encounter half a dozen names for the same product. Here’s the complete disambiguation:

For Canadian buyers, “intermodal container” is the most precise term but the rarest in everyday speech. Most Canadian sellers and buyers use “sea can,” “shipping container,” “C-Can,” or “conex box” depending on regional and industry background. The product itself is constant.

What Types and Sizes of Intermodal Containers Sell in Canada?

ISO standards define multiple intermodal container types beyond the standard dry van. The major categories appearing in the Canadian secondary market:

Dry Van Containers (90% of fleet)

The standard rectangular Corten steel container with cargo doors at one end. The dominant category by volume globally and in the Canadian secondary market. Available in 10ft, 20ft, 40ft, 45ft, and 53ft sizes, in Standard (2.59m external height) and High Cube (2.90m external height) variants.

Refrigerated Containers / Reefers (6% of fleet)

Insulated containers with refrigeration units, capable of maintaining temperatures from -30°C to +30°C. Used for cold-chain food, pharmaceutical, and wine storage. Refrigeration units from Carrier Transicold, Thermo King, or Daikin. See our more on refrigerated containers.

Open Top Containers

Same dimensions as dry van but with a removable canvas or steel roof, allowing top-loading of oversized cargo. Used for tall machinery, scrap metal, and out-of-gauge cargo.

Flat Rack Containers

Platform-based containers with collapsible end walls. Used for heavy equipment, machinery, and irregularly shaped cargo that doesn’t fit standard envelopes.

Tank Containers

Framed tanks for liquid, gas, or pressurized bulk cargo. About 0.75% of global fleet. Used for chemicals, fuels, and food-grade liquids.

Specialty Containers

Hard-top, ventilated, bulk, and offshore variants for specific cargo and operational requirements. Rarer in the Canadian secondary market but available through specialty suppliers.

How Does an Intermodal Container Reach Canada?

The pipeline that delivers an intermodal container to a Brantford yard:

1. Manufactured in China. CIMC factories produce approximately 2 million dry containers per year, 56% of the global market. Singamas and CXIC produce most of the rest. Each container takes a few minutes on a fully automated welding line.
2. Sold new to shipping line or leasing company. Maersk, MSC, CMA CGM, COSCO, Hapag-Lloyd, ONE, Evergreen, or one of the top 10 carriers. Or to leasing companies (Triton, CAI, SeaCube, Textainer) that lease to operators.
3. Loaded with cargo for first voyage. Typically consumer goods, electronics, furniture, industrial equipment destined for North America.
4. Ocean transit (4-6 weeks). Sails from a Chinese port (Shanghai, Shenzhen, Ningbo, Qingdao) via Panama Canal or Cape Horn to a Canadian or US port.
5. Arrival at Canadian port. Vancouver (1.35 million TEU annually), Montreal (1.75M TEU), Prince Rupert (1.3M TEU), or Halifax (600K+ TEU).
6. Unloaded by gantry crane. Lifted off the cargo ship by ship-to-shore crane onto a chassis trailer or rail well car.
7. Intermodal transit to inland destination. Rail or road transport to the cargo’s final delivery point.
8. Cargo unloaded. Container is now empty.
9. Return decision. Due to trade imbalance, returning the empty container to China is uneconomical. Many containers enter the secondary market in Canada.
10. Secondary market resale. Containers sold at port depots to dealers like Van Blanc. We source through established Canadian supply relationships.
11. Delivery to buyer. Van Blanc transports the container from our Brantford yard to the buyer’s property via tilt-deck truck. See our what to expect on delivery day for delivery detail.

This 11-step pipeline runs continuously across Canadian ports. Every container at the Van Blanc Brantford yard has lived its primary service as part of this global system.

How Much Does an Intermodal Container Cost in Canada in 2026?

Intermodal container pricing in Canada follows a grade-and-size matrix rather than a single sticker number. The biggest swing comes from condition, which is why it pays to understand how each used grade is inspected and rated before you ask for a number. Buyers who want a unit with the longest service life ahead of it usually start at our factory-fresh stock that has made a single loaded voyage, while everyone else weighs the used grades against the job. Here is what actually moves the quote:

Delivery from our Brantford yard is quoted separately and scales with the distance to your Ontario site. See our full dimensions and cost guide for the complete matrix, and if you are weighing the whole purchase decision, our walkthrough of the buying process from first call to delivery day lays out every step in order.

When you are ready to look at real units rather than ranges, our current Brantford inventory across every size and grade shows what is on the ground right now. The number you get back depends on which specific box you choose, which is the whole reason we let you walk the row in person.

Frequently Asked Questions

Pick your intermodal container in person at our Brantford yard

Every intermodal container in our Brantford yard has the same engineering DNA as the SS Ideal-X containers McLean shipped in 1956. The same eight corner castings Keith Tantlinger designed. The same Corten weathering steel. The same ISO 668 dimensions. The same 30+ year service life ahead of it once it leaves primary ocean service.

Van Blanc has been delivering intermodal containers across Ontario since 1995. Paul and Christian LeBlanc walk our 200+ container Brantford yard with customers every week. We deliver across Ontario in 1-3 business days. Payment is COD on delivery. No wire transfers, no deposits, no surprises.