20ft Open Top Shipping Containers for Sale

What is a 20ft Open Top Container?

A 20ft open-top shipping container is an ISO-standard Cor-Ten steel container constructed without a permanent steel roof. Instead, the roof structure consists of removable steel arches (roof bows) that support a heavy-duty, weatherproof tarpaulin cover. The top rear door header bar also swings out or unbolts, allowing full-height overhead access into the container body.

This layout permits efficient overhead loading using mobile cranes, overhead gantries, or site telehandlers. It is the preferred storage and transport format for industrial machinery, scrap metal, timber packs, site plant equipment, and heavy steel fabrications.

• Overhead crane access: Removable tarpaulin and roof bows allow vertical loading from above.
• Swivel door header bar: Hinged top rear bar swings clear to allow easy loading of tall equipment through the end doors.
• Integrated securing rings: Rated lashing points welded along the top and bottom interior side rails anchor heavy payloads.
• Standard ISO footprint: Full compatibility with container ships, rail wagons, and road trailers.

If your cargo requires overhead access across a larger floor area, review our 40ft open-top shipping containers. For cargo that exceeds standard container width, consider our flat-rack containers.

20ft Open Top Container Specifications

Accurate measurement is critical when planning site placement and cargo loading. External dimensions adhere strictly to ISO standards, while internal dimensions may vary slightly depending on manufacturer design.

For standard enclosed storage without crane requirements, explore our buy a 20ft container options.

Buying Versus Hiring 20ft Open Top Containers

Deciding whether to buy or hire a 20ft open-top container depends on your project duration, capital allocation, and intended operational use.

When Buying Makes Sense

• Permanent site infrastructure for storing over-height plant, machinery, or raw materials.
• One-way international export shipments where the container will not return to the supplier.
• Custom modifications such as welding permanent internal mounting cradles or specialised securing eyes.
• Long-term project timelines where outright purchase represents a lower total cost than ongoing rental fees.

When Hiring Makes Sense

• Short-term civil engineering projects, factory maintenance phases, or seasonal scrap clearance.
• Temporary site refurbishments where equipment will be off-hired upon completion.
• Scenarios where full technical support and rental flexibility are preferred over long-term asset ownership.

To evaluate flexible rental terms, see hire a 20ft open-top container. Compare long-term pricing structures using our container purchase or hire guide.

Equipment Condition Grades and Inspection Standards

Understanding condition grades ensures the equipment matches your operational and safety expectations, whether destined for a public-facing commercial site or international export.

Standard Condition Specifications

• New (One-Trip) Units: Manufactured overseas and shipped carrying a single cargo load. These feature immaculate exterior paintwork, pristine floors, clean tarpaulins, and integrated lockboxes.
• Used Wind and Watertight (WWT): Retired shipping line units that display surface rust, scratches, and cosmetic dents, but keep weather out provided the tarpaulin and roof bows are correctly installed.
• Cargo-Worthy: Inspected and certified structurally sound for intermodal ocean freight handling under active marine standards.
• IICL Grade: Evaluated under the strict inspection and repair benchmarks established by the International Institute of Container Lessors.

Any open-top container used for ocean freight export must feature an active CSC plate. A CSC plate is a statutory safety approval plate attached to the container certifying structural safety under the International Convention for Safe Containers, regulated by the IMO. When transferring freight to commercial carriers, standard liability terms published by BIFA establish clear contractual rules for handling and transit.

Delivery, Site Access, and Crane Placement

Delivering a 20ft open-top container requires thorough site access planning. Transport vehicles carrying 20ft units are heavy, rigid trucks that require clear access routes and hardstanding ground.

Site offloading is typically completed using HIAB crane-equipped lorries. Delivering a single 20ft unit requires an 8-wheeler rigid truck measuring approximately 12m in length and weighing up to 26 tonnes. Consult the UK government guide to lorry types and weights to review legal gross vehicle weights and axle load limits.

Site Preparation Checklist

• Ensure entrance gates and access roads provide a minimum clear passage width of 3m (10ft).
• Verify delivery routes and offload areas consist of firm hardstanding like concrete, tarmac, or compacted hardcore.
• Maintain a minimum overhead clearance of 6m to 8m, clear of power lines, low cables, tree branches, and building eaves.
• Provide a total width of 5m to 6m for the truck to deploy its hydraulic outrigger stabiliser legs.
• Ensure the offload zone is completely level across all four corner casting locations.

Placing an open-top container on soft grass or uncompacted ground causes the heavy steel frame to sink and twist (racking). Frame racking distorts the door box, causing end doors and swivel header bars to jam. Always support the four corner castings with level concrete pads, paving slabs, or railway sleepers to elevate the base and permit airflow underneath. For full logistics specifications, visit our guide to HIAB container delivery.

Weatherproofing, Condensation, and Export Compliance

Protecting open-top cargo from atmospheric moisture, road spray, and transit damage requires active site maintenance and regulatory compliance.

Ensure all transverse roof bows are installed correctly; missing or bent bows cause tarpaulins to sag and collect standing rainwater. Thread the TIR steel lashing cable continuously through all tarpaulin eyelets and corner eye-bolts to ensure custom seals remain tamper-evident during export transit.

Managing Atmospheric Condensation

• Avoid loading wet timber, damp packaging, or waterlogged machinery into the box.
• Elevate stored cargo off the marine plywood floor using wooden pallets to encourage continuous air circulation.
• Use commercial desiccant bags inside shrink-wrapped machinery to absorb ambient moisture.

Customs and Trade Compliance

When shipping containerised cargo internationally, verify payload weight limits against the CSC plate capacity. Ensure exported goods comply with trade tariff classifications and customs declarations via GOV.UK or the Department for Business and Trade. Define commercial risk transfer points using Incoterms 2020 frameworks published by the International Chamber of Commerce, and confirm comprehensive marine cargo insurance coverage prior to dispatch.

Step-by-Step Ordering Process

Follow this structured process to order your 20ft open-top container and prepare your site for delivery.

1. Assess exact cargo dimensions (length, width, height, gross weight) and confirm crane handling equipment.
2. Determine whether buying or hiring best aligns with your project duration and capital budget.
3. Select the condition grade (one-trip for clean appearance, cargo-worthy for export, WWT for site storage).
4. Survey site access routes, measuring gate clearance, turning radii, overhead height, and ground hardness.
5. Submit site photos or access notes to confirm HIAB truck vehicle clearance.
6. Prepare four level corner support pads using concrete slabs or timber sleepers at the designated set-down point.
7. Receive delivery, inspect roof bows, tarpaulin condition, and door header operation before loading cargo.