Product Overview & Engineering Specifications

High Cube Double Door Export Container: Technical Specification & Procurement Guide

The High Cube Double Door Export Container provides dual-end access combined with an extra foot of vertical clearance (9'6" overall height). Doors installed on both end frames eliminate single-point loading bottlenecks, allowing continuous workflow for machinery installation, pallet staging, and partitioned inventory management.

Standard Technical Parameters

Specification Category	20' High Cube Double Door	40' High Cube Double Door
External Dimensions (L x W x H)	6,058 x 2,438 x 2,896 mm	12,192 x 2,438 x 2,896 mm
Internal Dimensions (L x W x H)	5,844 x 2,352 x 2,698 mm	12,032 x 2,352 x 2,698 mm
Door Aperture Width x Height	2,340 x 2,585 mm	2,340 x 2,585 mm
Cubic Capacity	37.4 m3	76.4 m3
Tare Weight	2,450 kg	4,150 kg
Max Gross Weight (Rating)	30,480 kg	32,500 kg
Max Payload	28,030 kg	28,350 kg

Material Composition & Manufacturing Standards

Structural longevity in marine environments requires rigorous material selection and corrosion protection protocols.

Corrosion-Resistant Steel:

Structural frames and corrugated wall panels utilize JIS SPA-H / Corten-A weathering steel, offering atmospheric corrosion resistance up to 8 times higher than standard carbon structural steel.

Floor Construction:

28 mm thick Apitong/Keruing marine-grade plywood, treated against fungal decay and insect infestation, secured with anti-shear self-tapping stainless steel screws.

Welding Protocols:

Automated CO2 gas-shielded arc welding performed by certified operators under AWS D1.1 / EN ISO 9606 standards. Full-penetration welds undergo ultrasonic testing (UT) on critical structural corner castings.

Surface Preparation & Coating System:

Sa 2.5 abrasive blast cleaning to remove mill scale and impurities (Verified via factory production monitoring).
75-micron zinc-rich epoxy primer coat.
100-micron build intermediate epoxy coat.
50-micron acrylic polyurethane topcoat (total dry film thickness >= 225 microns).

Structural Advantages & Application Fit

Dual-End Access Engineering
End-to-End Workflow: Loading bulky industrial assets or long pipe sections proceeds through one door while unloading from the opposite end, minimizing handling cycle times.

Partitioned Security: Installing an internal mid-wall divider converts a single unit into two secure, independent storage bays with separate access points.

High Cube Height Clearance
Vertical Clearance: The 2,698 mm internal height accommodates taller industrial skids, pallet racks, and oversized machinery that exceed standard container thresholds.

CSC Safety & Intermodal Certification
Every unit carries a valid CSC (Convention for Safe Containers) safety approval plate, certifying structural capability for multi-tier stacking (up to 9 high at 24,000 kg per container) during ocean transit.

Certified for ISO, UIC, TIR, and Lloyd's Register (LR) / Bureau Veritas (BV) classification societies upon request.

Quality Control & Factory Testing

Manufacturing verification adheres to strict international compliance before port delivery:

Watertightness Test: 100% of manufactured units undergo high-pressure water jet testing (100 kPa nozzle pressure at 1.5 m/min) to detect seal defects along weld seams and door gaskets.

Light Leak Test: Internal inspection under darkened conditions verifies zero pinhole light penetration across roof and wall panels.

Dimensional & Squareness Verification: Diagonal tolerance checked within +/- 3 mm to ensure twist-lock alignment on container ships and chassis.

Door Operation Torque Test: Operating force measured on door locking cams and handles to ensure smooth engagement under full structural load torsion.

Procurement Decision & Ordering Guide

To streamline technical evaluation and RFQ processing for procurement engineers, verify the following parameters prior to quotation:

Operational Environment: Specify marine shipping, stationary on-site storage, or modular modification to determine the exact coating specification.

Regulatory Requirements: Confirm destination port requirements regarding CSC plate validity and classification society witness certificates.

Logistics & Delivery Mode: Units can be delivered empty as single boxes or loaded with customer cargo (SOC - Shipper Owned Container) via major export terminals.

FAQ

Q: How does dual-end door placement affect structural rigidity compared to standard single-door containers?

A: Removing one end wall and replacing it with a second heavy-duty door assembly introduces structural redistribution challenges. Engineering reinforcement utilizes thicker corner posts (JIS SPA-H, 6 mm to 8 mm wall thickness) and heavy-gauge header beams to maintain torsional rigidity and stacking ratings equivalent to standard ISO containers.

Q: What is the maximum floor load capacity for forklift operations inside the container?

A: The standard 28 mm marine plywood floor, supported by pressed steel cross-members spaced at 305 mm intervals, supports a forklift axle load of up to 7,260 kg per set of wheels, complying with ISO 1496-1 transverse floor strength requirements.

Q: Are these containers certified for international ocean freight as Shipper Owned Containers (SOC)?

A: Yes. Each unit is delivered with a valid CSC safety plate issued by an accredited classification society (e.g., BV, LR, ABS), permitting acceptance by major ocean carriers worldwide as an SOC.

Q: What are the packaging and delivery methods for bulk procurement?

A: Containers are typically delivered empty. For ocean transport, 20' and 40' high cube units can be shipped individually or coupled together in "daughter-mother" bundles (two or three smaller containers nested inside a larger one) to optimize ocean freight costs.