Conex Box in Alabama: A Complete Guide for Alabama Buyers

What is a Conex Box?

The word conex (sometimes spelled CONEX) is short for "container express," a term coined by the United States military in the 1950s for a standardized steel shipping container used to move equipment and supplies during the Korean War. The original CONEX boxes were 8.5 feet by 6 feet by 6.8 feet, much smaller than today's intermodal units, but the principle was identical: a stackable, lockable, weatherproof steel box that could move by truck, rail, or ship without unpacking.

By the late 1960s the commercial shipping industry had standardized on 20-foot and 40-foot intermodal containers, the units you see on every cargo ship and rail line today. The military term stuck in everyday speech. Many people still call any large steel storage box a conex, even when the unit is technically an ISO shipping container or a purpose-built storage container.

Whichever name is used, the container is a corrugated steel box, 20 or 40 feet long, with cargo doors on one end.

Conex Box vs Shipping Container vs Storage Container

The vocabulary lines up like this:

• Conex box. Originally a military-spec container. In modern use, a colloquial name for any steel shipping container used for storage. Most commonly applied to 20-foot and 40-foot units in residential and contractor settings.
• Shipping container. The technical term for an ISO-standard intermodal container. These are the units that cross oceans on cargo ships. They are built to ISO 1496 specifications, which dictate dimensions, lifting points, and structural strength.
• Storage container. A general retail and rental term used by ground-storage companies. Often refers to the same intermodal unit, but the phrase also covers purpose-built ground-level containers that have never seen ocean service.

If you are shopping for storage, the difference rarely matters. The same physical unit can be sold as any of the three. What matters more is the size, the condition grade, and the delivery logistics.

Standard Conex Box Sizes

There are three standard sizes:

• 20-foot standard. Length 20 ft, width 8 ft, height 8 ft 6 in. Interior floor about 19 ft 4 in by 7 ft 9 in, with 7 ft 10 in of height.
• 40-foot standard. Length 40 ft, width 8 ft, height 8 ft 6 in. Roughly 2,350 cubic feet, double the 20-foot. Best for contractors, farms, and businesses.
• 40-foot high cube. Length 40 ft, width 8 ft, height 9 ft 6 in. The extra foot of headroom adds about 350 cubic feet of usable space, which matters when you store racked goods or tall equipment.

Specialty sizes (10-foot, 45-foot, refrigerated, double-door, side-opening) exist but are less common.

Common Uses by Industry

In Alabama, containers can serve these industries:

• Automotive manufacturing. Alabama builds vehicles at five major plants: Mercedes-Benz at Vance in Tuscaloosa County, Honda at Lincoln in Talladega County, Hyundai at Montgomery, and the Mazda Toyota joint plant plus the Toyota engine plant at Huntsville.
• Aerospace, space and defense. Redstone Arsenal and NASA's Marshall Space Flight Center at Huntsville anchor an engineering contractor base, United Launch Alliance builds rocket stages at Decatur, and Blue Origin and other engine and component operations have added to it. Tooling, test hardware and program materials can be stored in secure boxes between milestones.
• Shipbuilding, the port and drayage. Austal USA builds Navy ships in Mobile, the Alabama State Port Authority runs the container terminal at Choctaw Point, and Airbus assembles aircraft at the Brookley Aeroplex. Drayage carriers, transload operators and freight forwarders around all three can use ground storage they control.
• Poultry. Broiler farms across Cullman, DeKalb, Marshall, Blount and Franklin counties need dry storage for feed, bedding, litter equipment, generators and biosecurity supplies between houses.
• Timber, pulp and paper. Alabama is roughly seventy percent forested, and pulp, paper and packaging mills in Autauga, Clarke and Choctaw counties, along with sawmills and chip mills across the southern half of the state, have landings, gates, equipment yards and mill fence lines where a container can sit.
• Iron, steel and cast pipe. Birmingham was built on iron ore, coal and limestone sitting close together, and the successor industry is still here. Cast iron pipe and steel operations in Jefferson County, the stainless and carbon steel complex at Calvert in Washington County, and the fabrication shops that feed them have stock, tooling and finished goods to stage.
• Coal and quarrying. The Warrior coal basin around Jasper, Brookwood and Oak Grove ships metallurgical coal down to Mobile for export, and the limestone, marble and aggregate operations around Sylacauga, Calera and Russellville run heavy equipment that needs parts stored close to the pit.
• Peanuts, cotton and row crop agriculture. The Wiregrass around Dothan, Enterprise, Geneva and Headland is peanut country, cotton runs through the Tennessee Valley and the Black Belt, and those operations need seasonal storage that locks and stays dry through harvest.
• Farm raised catfish. The pond country of Hale, Greene, Perry, Marengo and Bibb counties produces farm raised catfish. Feed, aerators, pumps, nets and spare motors can be stored in containers set at the pond levees.
• Coastal tourism, seafood and charter. Gulf Shores, Orange Beach, Fort Morgan and Dauphin Island support rental management companies, watersports and beach service crews, golf course maintenance teams and charter operations. The shrimp and seafood fleet at Bayou La Batre needs dry, lockable space near the water.
• Military installations and their contractor base. Redstone Arsenal at Huntsville, Maxwell Air Force Base and Gunter Annex at Montgomery, Anniston Army Depot, the Army aviation post at Daleville and Ozark, and Coast Guard Aviation Training Center Mobile anchor a base of contractors, and tools and parts can be stored within reach of a gate.
• Residential construction. Framers, roofers, electricians and remodelers working in Baldwin, Shelby, Madison, Limestone and Lee counties need secure storage for tools and materials on job sites.

Common uses:

• Tool, chemical, and equipment storage at working yards. Steel walls, lockable doors, and on-site placement make a conex a practical substitute for a built shed, a fenced compound or a temporary office.
• Weather-event storage for documents, heirlooms, and inventory.
• Construction jobsite storage on long-cycle builds. Project-driven needs where timing, access, and short-term affordability all matter.
• Acreage and farm storage. Permanent storage for the things a garage or barn cannot fit.

How to Choose the Right Conex Box

Three questions narrow the decision quickly:

1. How much space do you need? List what you intend to store. A 20-foot unit works for household goods during a renovation, materials for a residential framing job, or a few pallets of stock. A 40-foot unit doubles that. Compare the list with the container dimensions before you choose.
2. How clean does the interior need to be? If you are storing tools, equipment, or boxed goods, a used wind-and-water-tight unit is fine. If the unit will be converted to an office, a workshop, or a clean storage space, a one-trip unit saves the cost of repainting and floor refinishing later.
3. Will it move? If the container will sit on a single property for the whole life of its use, buying makes sense. For a project that ends in a few months, compare the cost of renting from a rental company with the cost of buying. Our rent vs buy guide walks through the crossover math.

How Delivery Works in Alabama

Conex boxes are delivered on a tilt-bed (sometimes called a roll-off) truck. The driver tilts the bed up, and the container slides off onto your placement site. Delivery follows this sequence:

1. Site assessment. Container One reviews the access route, the placement spot and the overhead clearance before scheduling. A 20-foot delivery needs 110 feet of straight clearance. The truck needs at least 15 feet of height to drive, at least 22 feet of height along the entire unloading path, and at least 10 feet of width. A 40-foot delivery needs 130 feet of straight clearance.
2. Surface check. Concrete, asphalt, gravel, hard-packed dirt, and grass all work. Soft, waterlogged, or steeply sloped ground may need preparation.
3. Final placement. The driver sets the container down on the prepared spot.

Container One's Delivery/Dispatch department schedules each delivery after payment and site review. Delivery areas across Alabama:

• North Alabama and the Tennessee Valley, including Huntsville, Madison, Decatur, Athens, Cullman and the Shoals (Huntsville is served from the Tennessee depot, 115 miles up I-65)
• The Birmingham metro, Over the Mountain and Shelby County (Birmingham is served from the Atlanta depot, 147 miles east on I-20)
• Mobile, Baldwin County and the coast (Mobile is served from the New Orleans depot, 149 miles west on I-10)

Permits and Local Rules

Permit rules depend on the municipality. Before ordering, check with your local building or planning department, and verify HOA rules if they apply. The permit guide for this state covers the questions to ask: container permits in Alabama.

What a Conex Box Costs in Alabama

Pricing is ZIP-specific, because delivery is part of the price. Alabama delivered pricing: starting at $2,279 for a 20ft Wind and Water Tight container delivered in Mobile. Prices as of 2026-08-06.

If you would rather spread the cost, rent-to-own is available through a third-party partner, My Container Rental.

Frequently Asked Questions About Conex Boxes